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Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

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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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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

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The horizontal fraction bar was introduced by the Arabs.

Stem Cell Research Could Expand Clinical Use of Regenerative Human Cells Stem Cell Research Could Expand Clinical Use of Regenerative Human Cells
Important Motor Regions of the Human Brain Important Motor Regions of the Human Brain
Various types of cells within the human body. Various types of cells within the human body.
The human X chromosome (left) and the Y chromosome (right). This false-color scanning electron micro The human X chromosome (left) and the Y chromosome (right). This false-color scanning electron micro
The photo is a cross-section of thickened human skin The photo is a cross-section of thickened human skin
Similar-looking, related species that are native to distant geographic realms Similar-looking, related species that are native to distant geographic realms
Video: EpiPen Animation (Part 2)

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