By Jennifer Boothroyd
An enticing examine the ways in which animals have interaction with humans and vegetation.
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Extra resources for Animals and the Environment (First Step Nonfiction)
The skin becomes dry and flaky, muscles begin to waste away, bones stop growing and may become brittle, and the heart weakens. Seeking to protect itself in the absence of proper insulation from fat, the body sprouts downy hair on the face, back, and arms in response to lower body temperature. In women, menstruation stops, and permanent infertility may result. Muscle cramps, dizziness, fatigue, and even brain damage as well as kidney and heart failure are possible. An estimated 10% to 20% of people with anorexia die either as a direct result of starvation or by suicide.
Eating disorders are virtually unknown in parts of the world where food is scarce, but in wealthy lands, such as the United States, problems of overeating, self-induced starvation, or forced purging have gained considerable attention. ” People with this problem go on eating binges, often gorging on junk food. Then they force their bodies to get rid of the food, either by vomiting or by taking large amounts of laxatives. A third type of eating disorder, obesity, also is characterized by uncontrollable overeating, but in this case the person does not force the body to eject the food that has been consumed.
It is converted to a compound called phenylpyruvate, which impairs normal brain development, resulting in severe mental retardation. issue, many experts contend that the proportion of fat to muscle, measured by the skinfold Other examples of metabolic disorders include alkaptonuria, thalassemia, porphyria, Tay-Sachs disease, Hurler syndrome, Gaucher disease, galactosemia, Cushing syndrome, dia- S C I E N C E O F E V E RY DAY T H I N G S VOLUME 3: REAL-LIFE BIOLOGY B O DY FAT, T H E S E X E S , A N D N AT U R E .