Question

Mark the following statements as True or False. Correct the statement
Exhaled air has more percentage of $CO_2$ than inhaled air.
A) True
B) False

Answer 1

Hint: Breathing (or ventilation) is the method of moving air out of and through the lungs to allow for gas exchange with the internal atmosphere, primarily to flush out carbon dioxide and bring in oxygen.

Complete answer:
Inhalation is the process of taking in oxygen-rich air, while exhalation is the process of releasing carbon dioxide-rich air. This is the fundamental method of breathing. In this case, one breath consists of a single complete inhalation and exhalation.
Intercostal muscles contract and travel up and away from the thoracic cavity. The diaphragm descends into the abdomen as it contracts. This muscle movement allows the lungs to expand and fill with air, almost like a bellows (inhalation). As the muscles relax, the thoracic cavity shrinks, the volume of the lungs shrinks, and air is expelled (exhalation).
So the statement Exhaled air has more percentage of $CO_2$ than inhaled air is True.
Why is it necessary to exhale carbon dioxide?
The created carbon dioxide is a waste product that must be removed. Carbon dioxide, like oxygen, is added to blood and taken to the lungs, where it is removed and we breathe it out. This is significant because if we couldn't extract carbon dioxide from our blood, it would consume all of our blood's carrying capacity and we wouldn't be able to bring oxygen to the rest of our body.

Note:
You breathe in oxygen because certain biological processes need it. One of the most significant is the production of ATP, the energy that all of our cells need. Electrons are used in the process, and oxygen has a high affinity for electrons.