The human respiratory system contains the organs that allow us to get the oxygen we need and to remove the waste carbon dioxide we do not need. It contains these parts: two lungs tubes leading ...

Gas exchange occurs in the alveoli which are found in the lungs. Many spongy mesophyll cells are in contact with the air spaces, providing a large surface area for gas exchange to happen.

In general, the capacity of the pulmonary system far exceeds the demands required for ventilation and gas exchange during exercise ... system may become a limiting factor to exercise at sea level and ...