Hoja de repaso: Renal Anatomy and Reproductive Structures

📋 Course Outline

1. Kidney & Position
2. Kidney & External Configuration
3. Kidney & Internal Structure
4. Renal Vascularization & Innervation
5. Ureter & Course
6. Urinary Bladder & Structure
7. Urinary Bladder & Vascularization
8. Urethra & Segments
9. Male Reproductive & Testicular Structures
10. Female Reproductive & Uterine Structures
11. Vulva & External Genitalia

📖 1. Kidney & Position

🔑 Key Concepts & Definitions

• Kidney (Ren): A paired, bean-shaped organ located in the posterior abdominal wall, responsible for filtering blood and producing urine.
• Hile (Hilum): The medial indentation of the kidney through which vessels, nerves, and the ureter enter and exit.
• Capsule Fibro-Graisseuse: Thick connective tissue capsule surrounding the kidney, providing protection and fixation.
• Parenchyme Rénal: Functional tissue of the kidney composed of cortex and medulla, responsible for filtration and urine formation.
• Pyramids Rénales: Cone-shaped structures in the medulla, containing collecting ducts that drain urine.
• Sinus Rénal: Central cavity in the kidney containing calices, vessels, nerves, and the pelvis.

📝 Essential Points

• Position & Relations: The kidneys are retroperitoneal, situated behind the peritoneum, with the right kidney slightly lower due to the liver's presence. They are applied to the posterior abdominal wall, lateral to the vertebral column, with the right kidney near T12-L3 and the left near T11-L2.
• External Configuration: Shaped like a bean, approximately 12 cm long, 6 cm wide, 3 cm thick; the right kidney is usually smaller. The superior pole aligns with the lower border of T12, and the inferior pole with L3.
• Fixation & Support: Enclosed in a fibro-fatty capsule (Gerota's fascia), which attaches the kidney to surrounding structures, including the diaphragm and posterior abdominal wall.
• Vascularization: Mainly supplied by a single renal artery (78%), with variations. The artery enters at the hilum, dividing into segmental branches. Venous drainage occurs via the renal vein into the inferior vena cava.
• Internal Anatomy: The cortex surrounds the medulla, which contains pyramids. The sinus houses calices, the pelvis, vessels, and nerves. The renal parenchyma is organized into lobes, each with a pyramid and surrounding cortex.
• Position of the Hile: Located at L1, with the renal vessels and ureter passing through it. The hilum faces medially, with the renal vein anterior to the artery and pelvis.
• Ureter Path: Extends from the renal pelvis to the bladder, passing anterior to the psoas muscle, crossing iliac vessels, and entering the pelvis.

💡 Key Takeaway

The kidneys are retroperitoneal, bean-shaped organs positioned along the vertebral column, stabilized by connective tissue capsules, with a complex internal structure that facilitates blood filtration and urine production. Their position and vascular relationships are crucial for understanding renal function and surgical approaches.

📖 2. Kidney & External Configuration

🔑 Key Concepts & Definitions

• Kidney (Rein): A bean-shaped organ located on the posterior abdominal wall, encased in a fibro-fatty capsule, responsible for filtering blood and producing urine.
• Hile (Hilum): The medial indentation on the kidney where vessels, nerves, lymphatics, and the ureter enter and exit.
• Capsule Fibro-Graisseuse: A fibrous and fatty connective tissue layer enveloping the kidney, providing support and protection.
• Pyramids Rénales: Cone-shaped medullary structures within the kidney, containing the collecting ducts.
• Cortex Rénale: The outer granular layer of the kidney, containing nephrons and renal corpuscles.
• Sinus Rénal: A cavity within the kidney that houses the renal pelvis, calices, vessels, and nerves.

📝 Essential Points

• External Shape & Dimensions: Kidneys resemble a bean, approximately 12 cm long, 6 cm wide, and 3 cm thick, with the right kidney slightly smaller than the left.
• Position & Orientation: Located behind the peritoneum, on the posterior abdominal wall, with the right kidney near T12-L1 and the left near T11-L2; the axes are inclined, not vertical.
• Poles & Borders: Each kidney has a superior pole (near T12) and an inferior pole (near L3); convex lateral border and a concave medial border with the hilum.
• Relations:
  • Anterior (Right): Liver, duodenum, colon, and right adrenal gland.
  • Anterior (Left): Stomach, spleen, pancreas, colon, and left adrenal gland.
  • Posterior: Diaphragm, muscles (psoas, quadratus lumborum, transversus abdominis), and ribs.
• Vascularization: Usually supplied by a single renal artery originating from the abdominal aorta at L1; variations include multiple arteries.
• Lymphatics & Nerves: Drain into lumbar lymph nodes; innervated by plexuses from the celiac and renal plexuses.

💡 Key Takeaway

The kidney's external configuration—its shape, position, and relations—are crucial for understanding its function and surgical approach, with the hilum serving as the gateway for vessels, nerves, and the ureter. Its protective capsule and complex vascularization reflect its vital role in blood filtration and urine formation.

📖 3. Kidney & Internal Structure

🔑 Key Concepts & Definitions

• Kidney: A bean-shaped organ located in the posterior abdominal wall, responsible for filtering blood and producing urine.
• Capsule Fibro-Graisseuse: Thick connective tissue capsule surrounding the kidney, providing protection and support.
• Hile (Hilum): The medial indentation where vessels, nerves, lymphatics, and ureter enter or exit the kidney.
• Sinus Rénal: A cavity within the kidney containing the renal pelvis, calices, vessels, and nerves.
• Pyramids Rénales: Triangular medullary structures that drain urine into minor calices.
• Parenchyme Rénal: The functional tissue of the kidney, comprising cortex and medulla.

📝 Essential Points

• External Configuration: The kidney resembles a bean, with a convex lateral border and a concave medial border (hilum). Dimensions are approximately 12 cm long, 6 cm wide, and 3 cm thick.
• Position & Orientation: Located behind the peritoneum, with the right kidney slightly lower than the left, aligned roughly with the T12 to L3 vertebrae.
• Fixation Structures:
  • Fascia Rénale (Gerota's fascia): Encloses the kidney and adrenal gland, attaching to the diaphragm and surrounding tissues.
  • Capsule Adipeuse: Fatty layer separating the kidney from surrounding fascia.
• Vascularization:
  • Usually supplied by a single renal artery, but multiple arteries can occur.
  • Renal veins drain into the inferior vena cava (right) or the left renal vein.
• Internal Structure:
  • Cortex: Outermost layer, granular, containing renal corpuscles.
  • Medulla: Inner part, composed of pyramids that drain into calices.
  • Sinus: Central cavity housing calices, vessels, and nerves.
• Urinary Conduction:
  • Urine flows from minor calices into major calices, then into the renal pelvis, and down the ureter to the bladder.
• Pyramids and Lobes:
  • Each pyramid plus surrounding cortex forms a lobe; lobes are separated by columns of Bertin.

💡 Key Takeaway

The kidney's complex internal architecture—comprising cortex, medulla, calices, and pelvis—facilitates efficient urine formation and drainage, supported by a rich vascular and nerve supply, all anchored securely within connective tissue structures.

📖 4. Renal Vascularization & Innervation

🔑 Key Concepts & Definitions

• Renal artery: The primary blood vessel supplying the kidneys, usually originating from the abdominal aorta at L1-L2, dividing into segmental branches within the hilum.
• Segmental arteries: Terminal branches of the renal artery that enter the kidney at the hilum, supplying specific segments without anastomoses.
• Renal vein: The vessel draining deoxygenated blood from the kidney into the inferior vena cava, with a right and left counterpart.
• Hile (Hilum): The medial indentation of the kidney where the renal artery, vein, lymphatics, and ureter enter/exit.
• Innervation: Nerve supply to the kidney, derived from the renal plexus, mainly from the celiac and aorticorenal plexuses, carrying sympathetic fibers.
• Lymphatic drainage: Lymphatic vessels from the kidney drain into the lumbar lymph nodes, following the renal vessels.

📝 Essential Points

• Vascularization:
  • The kidney is predominantly supplied by a single renal artery in 78% of cases; multiple arteries occur in 22%.
  • The renal arteries arise from the abdominal aorta at L1-L2, with the right being longer than the left.
  • Each renal artery divides into segmental arteries at the hilum, which further branch into interlobar, arcuate, and interlobular arteries.
  • The veins drain into the inferior vena cava (right) or left renal vein, which may receive tributaries from gonadal and adrenal veins.
  • The renal artery can have early divisions (ex-renal) or accessory arteries, which are important in surgical procedures.
• Innervation:
  • The renal plexus contains sympathetic fibers from the celiac and aorticorenal plexuses.
  • Sympathetic stimulation causes vasoconstriction, reducing renal blood flow.
  • Parasympathetic fibers are minimal or absent.
• Lymphatic drainage:
  • Lymph from the kidney drains into the lateral aortic (lumbar) lymph nodes.
  • Lymphatic pathways follow the renal vessels and may connect with lymphatics of adjacent organs like the colon.
• Vascular relationships:
  • The renal hilum contains the renal artery (posterior), renal vein (anterior), and the renal pelvis.
  • The renal artery crosses anterior to the renal vein at the hilum.
  • The renal arteries give off capsular branches to the capsule and ureteric branches to the ureter.

💡 Key Takeaway

The renal vascularization is characterized by a variable but highly organized arterial and venous system centered around the hilum, with sympathetic innervation controlling blood flow and lymphatic drainage paralleling vascular pathways, all crucial for renal function and surgical considerations.

📖 5. Ureter & Course

🔑 Key Concepts & Definitions

• Ureter: A muscular tube (~25 cm long) that transports urine from the renal pelvis to the urinary bladder.
• Hile (Hilum): The medial notch of the kidney where the ureter, renal artery, vein, lymphatics, and nerves enter/exit.
• Pelvis Renal (Renal Pelvis): The funnel-shaped structure that collects urine from the calices and narrows into the ureter.
• Calices (Minor & Major): Funnel-shaped chambers; minor calices collect urine from pyramids, major calices are formed by several minor calices.
• Ureteral Recessions & Recess Recess: Anatomical bends and constrictions, notably at the ureter's entry into the bladder and crossing over iliac vessels.
• Recessus (Recess): Anatomical curves or constrictions along the ureter's course, including the crossing over iliac vessels and at the bladder.

📝 Essential Points

• Course of the Ureter:

  • Originates at the renal pelvis at the hilum.
  • Descends vertically or obliquely, crossing anterior to the psoas major muscle.
  • Crosses over the common iliac artery at the pelvic brim (~5 cm below the bifurcation).
  • Continues into the pelvis, passing anterior to the sacroiliac joint.
  • Enters the bladder at the ureteric orifice, obliquely passing through the bladder wall to prevent reflux.

• Anatomical Relations:

  • Right Ureter: Crossed anteriorly by the right gonadal vessels, near the duodenum and right iliac vessels.
  • Left Ureter: Crossed anteriorly by the left gonadal vessels, near the sigmoid colon and left iliac vessels.
  • In the pelvis, it is related to the uterine artery in females and the ductus deferens in males.

• Constrictions (Potential Sites for Stones):

  • Ureteropelvic junction (pelvis to ureter)
  • Crossing over the iliac vessels
  • Ureteric entrance into the bladder

• Vascularization & Innervation:

  • Blood supply from renal, gonadal, and iliac arteries.
  • Innervated by renal, aortic, and hypogastric plexuses, important for pain sensation.

• Pathological Significance:

  • Stones often lodge at constrictions.
  • Surgical considerations include avoiding injury at crossing points and during ureteral reimplantation.

💡 Key Takeaway

The ureter follows a complex, anatomically constrained course from the kidney to the bladder, with critical relationships to surrounding vessels and organs; understanding these pathways and constrictions is essential for diagnosing and managing urinary tract pathologies.

📖 6. Urinary Bladder & Structure

🔑 Key Concepts & Definitions

• Urinary Bladder: A muscular, distensible organ that stores urine before excretion, located in the pelvis.
• Trigone: Triangular area on the internal surface of the bladder, defined by the openings of the ureters and the urethra, important for urinary flow regulation.
• Ductus Deferens & Ureteric Orifices: Openings of the ureters into the bladder, situated at the superior angles of the trigone.
• Detrusor Muscle: The smooth muscle layer of the bladder wall responsible for contraction during urination.
• Vesical Plexus: Network of veins draining the bladder, connected to the internal iliac veins.
• Ligaments & Support Structures: Structures such as the pubovesical ligament in females and the puboprostatic ligament in males that support the bladder.

📝 Essential Points

• Anatomical Position: The bladder is situated in the pelvis, posterior to the pubic symphysis, and varies in position depending on fullness.
• Structure & Layers: Composed of mucosa (transitional epithelium), submucosa, muscular layer (detrusor), and adventitia or serosa.
• Internal Features: The trigone is a smooth, triangular region with fixed openings of the ureters and urethra, crucial for preventing urine reflux.
• Ureteric Openings: Located at the superior angles of the trigone, oblique entry prevents backflow of urine.
• Urethral Orifice: Located at the apex of the trigone, leading to the urethra.
• Blood Supply & Innervation: Supplied by superior and inferior vesical arteries (from internal iliac arteries); innervated by sympathetic and parasympathetic fibers via the pelvic plexus.
• Lymphatic Drainage: Drains primarily to the internal iliac lymph nodes.
• Support & Ligaments: The bladder is anchored by ligaments that maintain position within the pelvis, with differences between males and females.

💡 Key Takeaway

The urinary bladder is a highly distensible muscular organ with a specialized trigone region that ensures unidirectional urine flow, supported by pelvic ligaments and richly supplied with blood and nerve fibers for its function and regulation.

📖 7. Urinary Bladder & Vascularization

🔑 Key Concepts & Definitions

• Urinary Bladder: A muscular, distensible organ in the pelvis that stores urine before micturition. It has a dome (apex), body, neck, and trigone region.
• Vascularization: The blood supply to the bladder, primarily from the superior and inferior vesical arteries, branches of the internal iliac artery.
• Superior Vesical Artery: Supplies the upper part of the bladder and the fundus.
• Inferior Vesical Artery: Supplies the lower part of the bladder, the prostate in males, and the vesicular part of the ureter.
• Venous Drainage: Mainly via vesical venous plexuses, which drain into the internal iliac veins.
• Lymphatic Drainage: To the external and internal iliac lymph nodes, and in males, also to the sacral lymph nodes.
• Innervation: From the hypogastric plexus (sympathetic fibers) and pelvic splanchnic nerves (parasympathetic fibers).

📝 Essential Points

• The bladder's blood supply is segmental, with the superior vesical arteries arising from the umbilical artery (via the anterior division of the internal iliac artery) and the inferior vesical arteries (in males) from the anterior division of the internal iliac artery.
• The venous plexuses around the bladder communicate with pelvic venous systems, providing pathways for potential spread of infections or malignancies.
• The lymphatic drainage pathways are crucial for understanding metastasis in bladder cancers, primarily draining to the iliac lymph nodes.
• Innervation controls bladder function: parasympathetic fibers induce contraction of the detrusor muscle, facilitating urination, while sympathetic fibers promote storage by relaxing the detrusor and contracting the internal sphincter.
• The bladder's position varies with filling; it is located entirely within the pelvis when empty but extends into the abdomen when full.

💡 Key Takeaway

The urinary bladder's rich vascular and lymphatic networks facilitate its vital functions and influence the spread of diseases; understanding its blood supply and innervation is essential for diagnosing and managing urinary and pelvic pathologies.

📖 8. Urethra & Segments

🔑 Key Concepts & Definitions

• Urethra: A muscular tube that conducts urine from the bladder to the exterior of the body.
• Segments of Urethra: Divided into prostatic, membranous, bulbar, and penile (penile or spongy) parts, each with distinct anatomical features.
• Urethral Sphincters: Muscles controlling the release of urine, including the internal (autonomic control) and external (voluntary control) sphincters.
• Urethral Meatus: The external opening of the urethra, located at the tip of the glans penis in males and in the vestibule in females.
• Urethral Length: Approximately 20 cm in males and 4 cm in females, varying with segments.
• Urethral Blood Supply & Innervation: Supplied by branches of the internal pudendal, vesical, and penile arteries; innervated by autonomic and somatic nerves.

📝 Essential Points

• Segmental Anatomy:
  • Prostatic urethra: Passes through the prostate gland; contains the ejaculatory ducts.
  • Membranous urethra: Shortest segment, passes through the urogenital diaphragm; most vulnerable to injury.
  • Bulbar urethra: Located in the bulb of the penis; surrounded by corpus spongiosum.
  • Penile (spongy) urethra: Runs along the length of the penis within the corpus spongiosum; terminates at the external urethral meatus.
• Functionality:
  • Conducts urine from the bladder.
  • In males, also conveys semen during ejaculation.
• Clinical Relevance:
  • Common sites of injury: membranous urethra during trauma.
  • Urethral strictures often occur in the penile segment.
  • Urethral catheterization involves navigating through segments, with caution at the membranous part.
• Anatomical Relationships:
  • The urethra is closely related to the prostate, pelvic floor muscles, and corpus spongiosum.
  • The external urethral sphincter surrounds the membranous urethra, providing voluntary control.
• Blood Supply & Innervation:
  • Blood: Branches from internal pudendal and vesical arteries.
  • Innervation: Pudendal nerve (somatic) and autonomic fibers from the pelvic plexus.

💡 Key Takeaway

The urethra's segmented anatomy reflects its complex functional roles and vulnerability to injury; understanding each segment's relationship with surrounding structures is essential for diagnosis and surgical intervention.

📖 9. Male Reproductive & Testicular Structures

🔑 Key Concepts & Definitions

• Testis: Paired male gonads responsible for sperm production and testosterone secretion; housed within the scrotum.
• Spermatic Cord: Bundle containing the vas deferens, testicular artery, pampiniform plexus, lymphatics, and nerves, providing vascular and neural supply to the testis.
• Vas Deferens: Muscular duct transporting sperm from the epididymis to the ejaculatory ducts.
• Epididymis: Coiled tube attached to the testis where sperm mature and are stored.
• Tunica Albuginea: Dense fibrous capsule covering the testis, dividing it into lobules.
• Testicular Artery: Branch of the abdominal aorta supplying blood to the testis.

📝 Essential Points

• Testicular Anatomy: The testes are oval-shaped, approximately 4-5 cm long, 2.5 cm wide, and weigh about 15-20 grams. They are suspended in the scrotum by the spermatic cord.
• Testicular Blood Supply: Primarily via the testicular artery, which arises from the abdominal aorta at L2. Venous drainage occurs through the pampiniform plexus, which forms the testicular vein.
• Testicular Innervation: Derived from the testicular plexus, originating from the renal and aortic plexuses, responsible for sensation and autonomic regulation.
• Spermatic Cord Structures: Includes the vas deferens, testicular artery, pampiniform plexus, lymphatics, and nerves; enclosed within the spermatic fascia.
• Epididymis: Located posterolateral to the testis, it is essential for sperm maturation and storage.
• Vas Deferens Pathway: Extends from the tail of the epididymis through the inguinal canal into the pelvis, joining the seminal vesicle duct to form the ejaculatory duct.
• Testicular Descent: Occurs in two phases during fetal development—transabdominal and inguinoscrotal—guided by the gubernaculum.

💡 Key Takeaway

The male reproductive system's testicular and associated structures are intricately organized to facilitate sperm production, maturation, and delivery, with a vascular and neural network that ensures proper function and regulation. Understanding their anatomy is crucial for diagnosing and managing reproductive and urological conditions.

📖 10. Female Reproductive & Uterine Structures

🔑 Key Concepts & Definitions

• Uterus: A pear-shaped muscular organ in the female pelvis, responsible for gestation, located between the bladder and rectum.
• Ovaries: Paired gonads producing oocytes and hormones (estrogen and progesterone), situated on each side of the uterus within the ovarian fossa.
• Fallopian Tubes (Uterine Tubes): Muscular channels connecting ovaries to the uterus, facilitating oocyte transport and fertilization.
• Ligaments: Connective tissues supporting reproductive organs, including the broad ligament, ovarian ligament, and round ligament.
• Cervix: The lower, narrow part of the uterus projecting into the vagina, acting as a passage for menstrual flow and childbirth.
• Vagina: Muscular canal extending from the cervix to the external genitalia, serving as the birth canal and copulatory organ.

📝 Essential Points

• Uterus Anatomy: Composed of the body, fundus, isthmus, and cervix; the fundus is the superior rounded part, and the cervix protrudes into the vagina.
• Ovarian Support: The ovaries are anchored by the ovarian ligament (to the uterus) and the suspensory ligament (containing vessels and nerves).
• Fallopian Tube Segments: Includes the infundibulum with fimbriae, ampulla (site of fertilization), isthmus, and intramural part passing through the uterine wall.
• Ligamentous Support:
  • Broad ligament: Encloses the uterus, fallopian tubes, and ovaries, providing major support.
  • Round ligament: Extends from the uterine horns to the labia majora, maintaining anteversion.
  • Uterosacral and cardinal ligaments: Provide posterior and lateral support respectively.
• Vascular Supply: Primarily from the uterine arteries (branch of internal iliac arteries) and ovarian arteries (branch of abdominal aorta).
• Innervation: Autonomic nerves from the hypogastric plexus supply the reproductive organs, mediating pain and reflexes.

💡 Key Takeaway

The female reproductive system comprises interconnected structures supported by ligaments and supplied by specific arteries and nerves, enabling reproductive functions such as ovulation, fertilization, pregnancy, and childbirth. Understanding their anatomy and relationships is essential for diagnosing and managing gynecological conditions.

📖 11. Vulva & External Genitalia

🔑 Key Concepts & Definitions

• Vulva: External part of the female genitalia, including the mons pubis, labia majora, labia minora, clitoris, vestibule, and associated glands.
• Labia Majora: Paired longitudinal skin folds containing adipose tissue, sweat glands, and hair follicles, forming the outer lips of the vulva.
• Labia Minora: Paired, thinner, hairless skin folds situated within the labia majora, enclosing the vestibule.
• Clitoris: Erectile organ located at the anterior junction of the labia minora, rich in nerve endings, responsible for sexual arousal.
• Vestibule: The space between the labia minora containing the openings of the urethra and vagina, as well as Bartholin's glands.
• Bartholin's Glands: Glands located at the posterior introitus that secrete mucus to lubricate the vulva.

📝 Essential Points

• The vulva's primary functions include protection of internal genital organs, sexual arousal, and lubrication.
• The mons pubis is a fatty prominence over the pubic symphysis, covered with pubic hair.
• The labia majora extend from the mons pubis to the perineum, enclosing the other external genital structures.
• The labia minora are highly vascularized and innervated, with their coloration varying from pink to darker hues.
• The clitoris is composed of corpora cavernosa, with a glans that is highly sensitive; it is homologous to the male penis.
• The vestibule contains the external openings of the urethra and vagina, along with Bartholin's glands which can become infected or cystic.
• The perineum is the area between the vulva and the anus, important in childbirth and susceptible to trauma.

💡 Key Takeaway

The vulva and external genitalia form a complex, highly sensitive structure essential for protection, sexual function, and reproductive health, with each component playing a vital role in female anatomy and physiology.

📊 Synthesis Tables

Aspect	Kidney & Position	Kidney & External Configuration	Kidney & Internal Structure	Vascularization & Innervation
Location	Retroperitoneal, T12-L3 (right slightly lower)	Behind peritoneum, lateral to vertebral column	Same as above	N/A
Shape & Size	Bean-shaped, ~12x6x3 cm	Bean-shaped, convex lateral border, concave medial border	Same	N/A
Relations	Anterior: liver, colon, duodenum, spleen	Anterior relations vary; posterior: diaphragm, muscles	Internal: cortex, medulla, sinus	N/A
Capsule	Fibro-fatty capsule (Gerota's fascia)	Capsule surrounds kidney, attached to diaphragm and posterior wall	Capsule protects internal structures	N/A
Vascular Supply	Single renal artery (~78%), variations	Renal artery enters hilum, divides into segmental arteries	Vessels: artery, vein, lymphatics	Innervated by renal plexus from celiac and aortic plexuses
Internal Structures	Cortex, medulla, pyramids, calices, pelvis	Cortex (granular), medulla (pyramids), sinus (calices, vessels)	Pyramids drain into calices, then pelvis	N/A

⚠️ Common Pitfalls & Confusions

1. Confusing the position of the right kidney being lower than the left due to the liver.
2. Misidentifying the hilum as the anterior border instead of the medial indentation.
3. Overlooking the variations in renal artery number and origin.
4. Confusing the renal pyramids with renal columns.
5. Mistaking the sinus for a cavity outside the kidney.
6. Assuming the renal vein is always anterior to the artery at the hilum.
7. Confusing the internal cortex and medulla's functions and locations.

✅ Exam Checklist

• Describe the position and relations of the kidneys.
• Identify the external features and shape of the kidney.
• Explain the structure and function of the renal capsule.
• Outline the internal architecture: cortex, medulla, pyramids, calices, pelvis.
• Describe the vascularization of the kidney, including the origin and branches of the renal artery.
• Explain the venous drainage of the kidney.
• Discuss the innervation of the kidney and its significance.
• Trace the course of the ureter from the renal pelvis to the bladder.
• Describe the course and segments of the urethra in males and females.
• Identify the main structures of the male reproductive system, including testes and associated structures.
• Outline the female reproductive system, focusing on the uterus and uterine tubes.
• Describe the external genitalia: vulva and associated structures.