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Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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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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To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Evolutionary change in the tetrapod lineage, showing a transitional form. Evolutionary change in the tetrapod lineage, showing a transitional form.
Snout and mouth of sand tiger shark, showing protruding teeth and small eyes Snout and mouth of sand tiger shark, showing protruding teeth and small eyes
Snow Leopard - Showing teeth at Taronga Zoo, Australia Snow Leopard - Showing teeth at Taronga Zoo, Australia
Brown teeth Brown teeth
Eruption of Permanent Teeth Eruption of Permanent Teeth
(a) The Dmanisi cranium (right) shows similarities to early African H. erectus including the Narioko (a) The Dmanisi cranium (right) shows similarities to early African H. erectus including the Narioko
Video: Chemical Buffers - protein buffer, phosphate buffer system and bicarbonate buffer system

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