Fundamentals of Respiratory Anatomy and Physiology

📋 Course Outline

1. Respiration Processes
2. Nasal Structures
3. Pharynx Functions
4. Lower Respiratory Tract
5. Larynx Anatomy
6. Trachea and Bronchi
7. Lung Anatomy
8. Alveoli and Gas Exchange
9. Pleural Membranes
10. Ventilation Mechanics
11. Pressure and Airflow
12. Gas Diffusion

📖 1. Respiration Processes

🔑 Key Concepts & Definitions

• Ventilation (see Seeley’s ESSENTIALS OF Anatomy & Physiology, 2019): The process of moving air into and out of the lungs, primarily driven by the diaphragm and intercostal muscles, facilitating the exchange of gases between the atmosphere and alveoli.
• Exchange of oxygen (O2) and carbon dioxide (CO2) between lungs and blood: The transfer of these gases occurs across the respiratory membrane, where O2 diffuses from alveoli into blood, and CO2 diffuses from blood into alveoli, driven by partial pressure gradients (see Seeley’s, 2019).
• Transport of O2 and CO2 in the blood: O2 binds to hemoglobin within red blood cells for transport, while CO2 is carried dissolved in plasma, bound to hemoglobin, or as bicarbonate ions, with the enzyme carbonic anhydrase facilitating CO2 conversion (see Seeley’s, 2019).
• Exchange of O2 and CO2 between blood and tissues: O2 diffuses from blood capillaries into tissues where Po2 is lower, and CO2 diffuses from tissues into blood, following partial pressure gradients, supporting cellular respiration (see Seeley’s, 2019).

📝 Essential Points