Because you need food to fill your stomach up, & if not your stomach shrinks and you need food to keep it feel, & that's how you get sick.
If you are anorexic, then you lose all muscle mass in your body, so your athletic abilities will be decreased.
Anorexia (the lack of appetite) they can get. But not Anorexia nervosa.
There is no such thing as a "science application for anorexia".
Please be more specific in who "they" are.
Anorexia can (and does) affect all systems and parts of the body.
Anorexia can commonly cause organs to become starved due to a lack of food and adequate nutrients. This can lead to organ malfunction or failure. Anorexia has also been known to cause anemia. The kidneys can have trouble processing nutrients and waste in the body, and can also begin to develop kidney stones.
Potentially, yes....but not really. Anorexia can slow down the production / functioning rate of the liver and cause lower body masses. This means it can take longer for any substance to pass through or be filtered through the body (as compared to a healthy individual), but that difference is not that significant.
Yes
It forces the body into breaking down its own muscle and fat cells to survive. Basically, by self-starvation anorexia makes the body consume itself. Anorexia nervosa (or simply anorexia) is an emotional disorder that can be life-threatening. It doesn
Anorexia can affect anyone, but most commonly is seen in girls and young women in middle- and upper-class families.
People with anorexia face the risk of low body mass and osteoporosis, as well as risking relapse of anorexia nervosa.
anorexia most commonly affects teenage/young girls and women who are quiet, shy, well behaved and high acheivers at school. but lots of people can get anorexia...men, women, different ages.