Ventilation — definition?
Movement of air into and out of lungs.
Respiratory system functions?
Ventilation, gas exchange, protection, olfaction.
Upper respiratory structures — role?
Condition, filter, and conduct air to lower respiratory tract.
Alveoli — role?
Gas exchange surface in lungs.
Gas exchange in alveoli — process?
Diffusion of oxygen into blood and CO₂ out.
Hemoglobin — function?
Binds oxygen in blood.
Partial pressure — significance?
Determines gas diffusion direction.
Breathing regulation — control centers?
Medulla and pons in brainstem.
Upper respiratory — structures?
Nasal cavity, pharynx, larynx.
Gas exchange — location?
Across alveolar-capillary membrane.
Test your knowledge with 10 questions on Introduction to the Respiratory System.
1. What is the primary function of gas exchange in the respiratory system?
2. What is the primary function of alveoli in the respiratory system?
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