<span>Red blood cells do not contain a nucleus because their purpose is to carry oxygen around the body. Due to the fact these cells do not have a nucleus, their capacity to carry this oxygen is increased greatly.</span>
Anorexia nervosa is characterized by a strong desire to lose weight due to the fear of becoming thin.
Here the person is on a low caloric restriction diet, and the person often assumes that he/she is overweight even though the person is underweight.
In the given situation, Katie is skipping meals and throwing away food and constantly losing weight, all these are the characteristic symptoms of anorexia nervosa as described above.
