ANATOMY

Detailed explanation-1: -What is wrong in the statement “We breathe in oxygen and breathe out carbon dioxide”? Answer: The statement is wrong. The air we inhale has more of oxygen and less of carbon dioxide.

Detailed explanation-2: -As we all knew that our body and the cells inside it require more oxygen to respire and to perform its regular functions and our environment does not provide us with an exclusive supply of oxygen. In a similar way, while breathing out, we do exclusively give out carbon dioxide.

Detailed explanation-3: -Internal and external respiration At the same time, the carbon dioxide waste from the breakdown of sugars in the cells of the body diffuses into the blood and then diffuses from the blood into the lungs and is expelled as we breathe out. One gas (oxygen) is exchanged for another (carbon dioxide).