Question

oxygen important for our breathing but what will happen if CO2 and other gases vanish away completely justify your answer
class 7 ​

Answer 1

Answer:

As we breathe in, oxygen enters the lungs and diffuses into the blood. It is taken to the heart and pumped into the cells. ... One gas (oxygen) is exchanged for another (carbon dioxide). This exchange of gases takes places both in the lungs (external respiration) and in the cells (internal respiration).

Explanation:

Answer 2

Answer:

one main reason is for plants , plants are source of food for organisms , they exchange gases

Explanation:

like plants take in CO² and give out 0² oxygen

hope understand

which book?

workbook ? 7th ? cbse?