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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.
People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.