How do humans use carbon dioxide?

Answer 1

There are a couple of important ways our body uses carbon dioxide:

In respiratory physiology, carbon dioxide is the trigger to breathe. In other words, when you hold your breath, the urgency you feel to take another breath is caused by the buildup of carbon dioxide in your bloodstream. The reason you can suppress the urge to breathe by taking several deep breaths first is that this "washes" much of the CO2 from your system.

Carbon dioxide in the blood is also used to produce bicarbonate. Bicarbonate is an alkaline, and a vital component of the pH buffering system of the body (maintaining acid-base homeostasis). 70%-75% of CO2 in the body is converted into carbonic acid (H2CO3), which can quickly turn into bicarbonate (HCO3−).

Answer 2

In most circumstances carbon dioxide is a waste product rather than a useful resource, however, people do have a few uses for it. It is used to make bubbly, Carbonated Beverages - those bubbles are made of carbon dioxide. It is sometimes used as a fire fighting substance, although it has fallen out of favor lately and the current fire extinguishers use something else. And in its frozen form, as "dry ice" it can be used for some very nice special effects, or for more serious forms of refrigeration than you can get with ordinary ice (since it is significantly colder).

Answer 3

They release it after the process of CellularRespiration and Respiration.