Скачать или смотреть 1.5 Gases Exchange In Alveoli 1.5.1 Composition of Inspired and Expired Air | 10th Class Biology New

Gases Exchange in Alveoli

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.


As a result the composition of inhaled and exhaled air is different.
...
Inhaled and exhaled air.
Gas % in inhaled air % in exhaled air
Oxygen. 21 16
Carbon dioxide. 0.04. 4
Nitrogen. 79. 79



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