explain breathing cycle in humans
Answers
Answered by
2
An exchange of oxygen and carbon dioxide takes place in the alveoli, small structures within the lungs. The carbon dioxide, a waste gas, is exhaled and the cycle begins again with the nextbreath. ... During exhalation the diaphragm expands to force air out of the lungs. Adults normally take 12 to 20 breaths per minute
Answered by
6
Air, a mix of oxygen and other gases, is inhaled. In the throat, the trachea, or windpipe, filters the air. The trachea branches into two bronchi, tubes that lead to the lungs. Once in the lungs, oxygen is moved into the bloodstream. Blood carries the oxygen through the body to where it is needed.
Similar questions