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Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

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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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There are approximately 3 million unintended pregnancies in the United States each year.

Many human diseases are caused by mutations in single genes Many human diseases are caused by mutations in single genes
Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort
Notice the reddish-brown haze caused by nitrogen oxides that is often over many major cities. Notice the reddish-brown haze caused by nitrogen oxides that is often over many major cities.
Spinal changes caused by osteoporosis. Spinal changes caused by osteoporosis.
Inflammation of the oropharynx and petechiae (small red spots) on the soft palate caused by strep ... Inflammation of the oropharynx and petechiae (small red spots) on the soft palate caused by strep ...
Crown gall disease caused by Agrobacterium via plant transformation Crown gall disease caused by Agrobacterium via plant transformation
Video: Graded potentials - electrical characteristics and types

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