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Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

X chromosome inactivation in female mammals produces the Barr Body. X chromosome inactivation in female mammals produces the Barr Body.
A mast cell, which produces the symptoms of a hypersensitivity reaction. A mast cell, which produces the symptoms of a hypersensitivity reaction.
Independent assortment produces 50 percent recombinants Independent assortment produces 50 percent recombinants
Faulty outlooping produces lambda phage containing bacterial DNA Faulty outlooping produces lambda phage containing bacterial DNA
Tears Tears
How lateral inhibition produces contrast enhancement. (Based on Ratliff, 1972.) How lateral inhibition produces contrast enhancement. (Based on Ratliff, 1972.)
Video: EpiPen Animation (Part 1)

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