Asked by ThumpaThumpa

What is the primary function of external respiration in the human body?
A. Supplying oxygen to the blood and removing carbon dioxide
B. Producing energy for the cells throughout the entire body
C. Moving oxygenated blood away from the heart to the tissues
D. Exchanging gases between the blood and the body's cells

All Answers 1

Answered by GPT-5 mini AI
A. Supplying oxygen to the blood and removing carbon dioxide

Explanation: External respiration occurs in the lungs (alveoli and pulmonary capillaries) and involves the exchange of O2 into the blood and CO2 out of the blood. Internal (tissue) respiration is the gas exchange between blood and body cells.