GENERAL HISTOLOGY

Detailed explanation-1: -Carbon dioxide (CO2) is a waste product of cellular metabolism. You get rid of it when you breathe out (exhale). This gas is transported in the opposite direction to oxygen: It passes from the bloodstream – across the lining of the air sacs – into the lungs and out into the open.

Detailed explanation-2: -Carbon dioxide diffuses into the lungs and is expelled as we exhale. While the deoxygenated blood travels in the veins, detectors in the brain and blood vessels (chemoreceptors) measure the blood’s pH.

Detailed explanation-3: -In the human body, carbon dioxide is formed intracellularly as a byproduct of metabolism. CO2 is transported in the bloodstream to the lungs where it is ultimately removed from the body through exhalation.

Detailed explanation-4: -The Respiratory System When you breathe out, the same thing happens – only in reverse. This is how the body gets rid of carbon dioxide. The blood collects carbon dioxide from all over the body and carries it back to the air in the alveoli.

Detailed explanation-5: -When you breathe out, or exhale, your diaphragm and rib muscles relax, reducing the space in the chest cavity. As the chest cavity gets smaller, your lungs deflate, similar to how air releases from a balloon.