Question

"breathing cycle is rhythmic whereas exchange of gases is a continuous process "justify the statement

Answer 1

The breathing cycle involves inhalation and exhalation of air due to alternate expansion and contraction of thoracic cavity. Thus it is a rhythmic process. But exchange of gases is a continuous process as it takes place between the blood and each and every cell, by diffusion.

Answer 2

Answer:

The breathing includes inhalation and exhalation which are to be taken place one after another whereas the exchange of gases across diffusion membrane in lungs or in tissues is continuous.

Explanation:

Breathing simply means inhalation and exhalation.

Inhalation means to inhale air and exhalation means to exhale air.

These two processes took place one after another thus forming a rhythmic activity. That is why the breathing cycle is called rhythmic.

In the case of an exchange of gases whether it is taking place at the site of the lungs or at tissues it is continuous because our body tissues require a continuous supply of oxygen and continuous removal of carbon dioxide.

That's why gaseous exchange is continuous.