Assertion: All the factors in our body are favourable for diffusion of `O_(2)` from alveoli to tissues and that of `CO_(2)` from tissues to alveoli.
Reason: The role of oxygen in the regulationf respiratory rhythm is quite significa

Why all factors of body are favourable for diffusion of O_(2) from alveoli to tissues and of CO_(2) from tissue cells to alveolis ?

Assertion : Alveoli are the primary sites for exchange of gases. Reason : All factors in our body are favourable for diffusion of O_(2) from alveoli to tissues and that of CO_(2) from tissues to alveoli.

Assertion : O_(2) easily diffuses from alveoli to tissues and CO_(2) from tissue to alveoli. Reason : Alveoli is 2-celled thick and capillaries are thin walled.

Assertion : O_(2) easily diffuses from alveoli to tissues and CO_(2) from tissue to alveoli. Reason : Alveoli is 2-celled thick and capillaries are thin walled.

Assertion :- A chemosensitive area is situated adjacent to the rhythm centre which is highly adjacent to the rhythm centre which is highly sensitive to CO_(2 and hydrogen ions. Reason :- The role of oxygen in the regulation of respiratory rhythm is quite insignificant .