The exchange of gases (O_2 text{ and } CO_2) | vedclass

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(D) In mammals,the respiratory system is designed for efficient gas exchange. Air travels through the trachea,bronchi,and bronchioles,which serve as c

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Alveoli

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(D) In mammals,the respiratory system is designed for efficient gas exchange. Air travels through the trachea,bronchi,and bronchioles,which serve as conducting zones. The actual exchange of gases $(O_2 	ext{ and } CO_2)$ occurs by simple diffusion across the respiratory membrane of the alveoli. Alveoli are thin-walled,sac-like structures surrounded by a dense network of capillaries,providing a large surface area for gas exchange.

The exchange of gases $(O_2 \text{ and } CO_2)$ in a mammal takes place in:

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