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Author Question: Substances produced within the body that serve to regulate pain are called: a. hormones b. ... (Read 42 times) |
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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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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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Everyone has one nostril that is larger than the other.
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Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.