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Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Mechanoreceptors in the lateral line system that detect changes in water movement. Mechanoreceptors in the lateral line system that detect changes in water movement.
Top down view of Olympus Mons, the highest known mountain in the solar system Top down view of Olympus Mons, the highest known mountain in the solar system
Immune System Concept Map Immune System Concept Map
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Schematic of a typical electronic throttle control (ETC) system. Note that terminal #5 is always ... Schematic of a typical electronic throttle control (ETC) system. Note that terminal #5 is always ...
Principle Structures of the Limbic System Principle Structures of the Limbic System
Video: Digestive chemicals - types & enzymes

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