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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Water striders serve as a model organism for the study of sexual conflict between males and females. Water striders serve as a model organism for the study of sexual conflict between males and females.
Colostomy. Alternate versions of colostomy are illustrated, each of which creates one or more new op Colostomy. Alternate versions of colostomy are illustrated, each of which creates one or more new op
Nurses, here to serve Nurses, here to serve
(a) Homologous traits are similar due to shared ancestry. (b) Analogous traits (bats’, birds’, and f (a) Homologous traits are similar due to shared ancestry. (b) Analogous traits (bats’, birds’, and f
This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p This engraving of the Boston Massacre (1770) became the most reprinted depiction of the event, and p
5. Social contract theorists believe that the social contract is/was a historical fact. ... 5. Social contract theorists believe that the social contract is/was a historical fact. ...
Video: Ionic bonds - role of ions in the body

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