Where does diffusion occur in the body?

Diffusion in the human body:

1. Diffusion is a physical process of describing the net migration of molecules from a high-concentration region to a low-concentration zone.
2. Diffusion is a process that aids in the flow of gases.
3. Diffusion aids gaseous exchange, water, salt, and waste removal from our kidneys in the human body.
4. Diffusion has the advantage of requiring no energy for regulation, as opposed to a cell producing proteins to pump molecules over a membrane.
5. Chemical and gas diffusion in and out of cells is an important activity in human organs.
6. The lungs are where oxygen and carbon dioxide gas diffuse. The kidneys are responsible for the diffusion of water, minerals, and waste products.
7. In the intestines, calcium from meals diffuses into cells.