Psychological disorders which may be confused with an eating disorder, or be co-morbid with one: 1  Emetophobia is an anxiety disorder characterized by an intense fear of vomiting. A person so afflicted may develop rigorous standards of food hygiene, such as not touching food with their hands.
Having a good lung capacity is important because you'll need it when it comes to sports and running.
The process of diffusion! The alveoli are very important in this process, not only because they allow the transfer of oxygen and carbon dioxide, but also because they give the lungs their huge surface area. With all this surface area, they can accomplish their massive task of keeping the body supplied with oxygen.