1.

Why external respiration is known as the breathing.​

Answer»

Answer:

GAS exchange in the lungs is REFERRED to as external respiration as one SIDE of the respiratory membrane - that is, the alveolar AIR - is actually outside of the body. As blood flows through the pulmonary capillaries, oxygen diffuses into the blood and carbon DIOXIDE diffuses into the alveolar gas.

Explanation:

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