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Did you know?

The human body produces and destroys 15 million blood cells every second.

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The average adult has about 21 square feet of skin.

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If all the neurons in the human body were lined up, they would stretch more than 600 miles.

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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

The male reproductive system. The male reproductive system.
The carnitine acyltransferase system, for transport of fatty acyl-CoAs into mitochondria The carnitine acyltransferase system, for transport of fatty acyl-CoAs into mitochondria
Male Reproductive System - Semen Male Reproductive System - Semen
Respiratory system Respiratory system
A partial genetic map of the four chromosomes of Drosophila melanogaster A partial genetic map of the four chromosomes of Drosophila melanogaster
Major blood vessels of the human cardiovascular system Major blood vessels of the human cardiovascular system
Video: Non-polar compounds - insolubility

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