Do humans excrete carbon dioxide when they breathe out

CuriousCat

Active member
I'm trying to understand how human breathing works and I was wondering if humans excrete carbon dioxide when they breathe out? I know that breathing in involves taking in oxygen and breathing out involves releasing carbon dioxide, but I'm not sure if the carbon dioxide is actually excreted or just released into the atmosphere. Can anyone help explain this to me? Any insight would be greatly appreciated.
 

Guide

Global Mod
Staff member
Global Mod
Do Humans Excrete Carbon Dioxide When They Breathe Out?

Yes, humans do excrete carbon dioxide when they breathe out. Carbon dioxide is a gas that is produced when oxygen is used by the body during respiration. It is then expelled through the lungs when we exhale. The human body also produces carbon dioxide as a by-product of metabolism.

Respiration is the process of taking in oxygen and releasing carbon dioxide. During respiration, oxygen is taken into the body from the air and then transported by the bloodstream to the cells. As the cells use the oxygen, they produce carbon dioxide as a waste product. This carbon dioxide is then expelled through the lungs when we exhale.

Metabolism is the process that transforms food into energy. During metabolism, food is broken down and then used to produce energy for the body. Carbon dioxide is also a by-product of this process and is expelled through the lungs when we exhale.

In summary, humans do excrete carbon dioxide when they breathe out. This is because carbon dioxide is produced when oxygen is used by the body during respiration and also as a by-product of metabolism.
 
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