MICROANATOMY

Detailed explanation-1: -Yes, it is true that animals breathe oxygen and give out carbon dioxide; this is done in the process of respiration. When we inhale or breathe in, we pull air mainly containing nitrogen and oxygen into our lungs, and whenever we exhale or breathe out, we mostly release carbon dioxide.

Detailed explanation-2: -Human beings do exhale almost three billion tons of carbon dioxide annually, but the carbon we exhale is the same carbon that was “inhaled” from the atmosphere by the plants we consume.

Detailed explanation-3: -We breathe in air from the atmosphere which is a mixture of all gases. The lungs absorb oxygen during inhalation and expel carbon dioxide during exhalation. The air that is exhaled out is also a mixture of gases but it is rich in carbon dioxide.

Detailed explanation-4: -So that’s what you inhaled. And when you exhaled, you exhaled this gas that’s called carbon dioxide. So you inhaled oxygen that is in the air and you exhaled carbon dioxide.