The absorption of nutrients in the small intestine is a crucial step in the digestive process.
A giraffe breathes in much the same way people do. They have lungs, a diaphragm to expand the lungs (causing air to be "sucked into" the lungs) and the lung structure to allow gas exchange (the release of carbon dioxide and the absorption of oxygen). Through its nose.
Lungs
The air breathed out
The air breathed out
There is exchange of CO2 and O2 in the lungs of aerobic vertebrates. The process is generally referred to as gas exchange. It depends on what organism you're talking about. It could be the skin, gills, lungs, or any other structure. In the lungs is the Alveoli.
Respiration is the process in the lungs of absorbing oxygen into tissue while removing carbon dioxide. This is carried out by inhalation and exhalation.
These small sac like structure are known as the alveoli . The alveoli help in the exchange of the gases, oxygen & carbon-dioxide,Lungs contain alveoli to increase the surface area and to easily transport oxygen to the blood vessels which surrounds the air sacs. Also, the air sacs have a thin film of oxygen which helps to absorb oxygen quickly.
Breathing.
Lungs, gills and sometimes skin.
The alveoli is the structure of the lungs where the exchange of carbon dioxide and oxygen occur. The alveoli are like tiny sacs of air.
Oxygen and carbon dioxide increase and decrease in the lungs.