Gas Exchange Overview
Gas exchange occurs when oxygen diffuses into blood and carbon dioxide diffuses out through alveolar membranes.
Diffusion Efficiency
Diffusion depends on surface area membrane thickness and pressure gradients.
Alveolar Ventilation
Effective ventilation ensures fresh air reaches alveoli for proper exchange.
Oxygen Transport
Most oxygen binds to hemoglobin for delivery to tissues.
Carbon Dioxide Removal
Carbon dioxide is transported dissolved bound or as bicarbonate.
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