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Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

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There are approximately 3 million unintended pregnancies in the United States each year.

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Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

The stages of labor and delivery. (A) During the dilation stage the cervix thins and dilates to 10 c The stages of labor and delivery. (A) During the dilation stage the cervix thins and dilates to 10 c
Muscle Strength of the Elbow Muscle Strength of the Elbow
Arrector pili muscle Arrector pili muscle
Cricothyroid muscle Cricothyroid muscle
Trabeculae carneae (folds of muscle in ventricle) Trabeculae carneae (folds of muscle in ventricle)
Types of muscle tissue. Types of muscle tissue.
Video: Neural Reflex Arc Animation

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