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Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Cellular section from the brain of a person who died from Alzheimer's disease. Cellular section from the brain of a person who died from Alzheimer's disease.
Posterior half of the brain. Posterior half of the brain.
Basic brain diagram Basic brain diagram
blank brain diagram blank brain diagram
Lobes of the brain, with primary receiving and integrating centers of the human cerebral cortex. Lobes of the brain, with primary receiving and integrating centers of the human cerebral cortex.
Video: Digestive chemicals - types & enzymes

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