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Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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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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The average adult has about 21 square feet of skin.

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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Examples of common surgical positions. Examples of common surgical positions.
(a) Chimpanzees and (b) bonobos likely diverged from a common ancestor due to allopatric speciation (a) Chimpanzees and (b) bonobos likely diverged from a common ancestor due to allopatric speciation
Common Laboratory Tests and Their Normal Values Common Laboratory Tests and Their Normal Values
A roller cell-type electric fuel pump. A roller cell-type electric fuel pump.
Common Oral Lesions/Conditions Associated with HIV Infections and Treatment Guidelines Common Oral Lesions/Conditions Associated with HIV Infections and Treatment Guidelines
Common Cytochrome P450 Drug Interactions in Dentistry Common Cytochrome P450 Drug Interactions in Dentistry
Video: Definitions of stroke volume, preload definition & Factors influencing stroke volume

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