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Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

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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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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

The male reproductive system. The male reproductive system.
Male Urogenital System Male Urogenital System
Organizational Effects of Testosterone Around the time of birth, testosterone masculinizes and defem Organizational Effects of Testosterone Around the time of birth, testosterone masculinizes and defem
A colorized image of human chromosomes A colorized image of human chromosomes
Mataphase chromosomes that are derived from chromatin during mitosis Mataphase chromosomes that are derived from chromatin during mitosis
How to impress a choosy female: Male fiddler crabs (top) wave their one enlarged claw to a attract a How to impress a choosy female: Male fiddler crabs (top) wave their one enlarged claw to a attract a
Video: Autonomic Nervous System Animation

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