There are more bacteria in your mouth than there are people in the world.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
An overview of the process of primary and secondary growth in a woody stem.
Stem Cell
Embryonic Stem Cells
Brain Stem and Cerebellum
Stem Cells
Locations of tissues in the stem of a sunflower (Helianthus).