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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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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Variations in the structure of viruses. Variations in the structure of viruses.
Continued harvest of (a) cod and (b) mountain sheep by humans has caused evolutionary changes in mat Continued harvest of (a) cod and (b) mountain sheep by humans has caused evolutionary changes in mat
The family tree of HIV and related viruses The family tree of HIV and related viruses
Uticaria, a skin rash caused by type I hypersensitivity. Uticaria, a skin rash caused by type I hypersensitivity.
Vaginal Discharge with Microorganisms Caused by Trichomoniasis Vaginal Discharge with Microorganisms Caused by Trichomoniasis
Cystic fibrosis is caused by a mutation in a protein called CFTR Cystic fibrosis is caused by a mutation in a protein called CFTR
Video: Splitting of Sugar, Oxidation/ Reduction & ATP Generation

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