Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
The human hypothalamus (in color) in relation to the optic chiasm and the pituitary gland.
