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Did you know?

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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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

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Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

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The horizontal fraction bar was introduced by the Arabs.

Environmental influences on the expression of PKU within a single family Environmental influences on the expression of PKU within a single family
Single-gene inheritance tracked at the DNA level Single-gene inheritance tracked at the DNA level
Bacterial colonies, each derived from a single cell Bacterial colonies, each derived from a single c Bacterial colonies, each derived from a single cell Bacterial colonies, each derived from a single c
Vasectomy. (a) Vas deferens is located within the spermatic cord on both sides. (b) A small incision Vasectomy. (a) Vas deferens is located within the spermatic cord on both sides. (b) A small incision
Single-cell circulation model Single-cell circulation model
A single cell from an early-stage human embryo A single cell from an early-stage human embryo
Video: Introduction to Genetics

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