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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.

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Thyroid conditions may make getting pregnant impossible.

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Ectopic pregnancies. (a) An ectopic pregnancy may occur in any of the locations shown. Interstitial Ectopic pregnancies. (a) An ectopic pregnancy may occur in any of the locations shown. Interstitial
(a) Parathyroid hormone (PTH); (b) calcitonin action. (a) Parathyroid hormone (PTH); (b) calcitonin action.
Selected Factors Affecting the Release of Growth Hormone Selected Factors Affecting the Release of Growth Hormone
The development of an ovary and a testis from the cortex and the medulla, respectively, of the ... The development of an ovary and a testis from the cortex and the medulla, respectively, of the ...
Mechanisms of Hormone Action Mechanisms of Hormone Action
Animated Changes in the ovary and uterus correlated with changing hormone levels. We start with the Animated Changes in the ovary and uterus correlated with changing hormone levels. We start with the
Video: The primary factors that affect circulation - MABP, CO and SVR

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