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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

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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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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Fluids inside and outside of cells Fluids inside and outside of cells
In this design, the fuel injector is at the top of the cylinder and sprays fuel into the cavity of ... In this design, the fuel injector is at the top of the cylinder and sprays fuel into the cavity of ...
Flow cytometry. Cells expressing the surface markers CD4, CD8, and CD3 are labeled in a direct ... Flow cytometry. Cells expressing the surface markers CD4, CD8, and CD3 are labeled in a direct ...
Reed-Sternberg cells: Bilobed nucleus coupled with the prominent nucleoli gives this cell the ... Reed-Sternberg cells: Bilobed nucleus coupled with the prominent nucleoli gives this cell the ...
Over time, cells acquire mutations. Two independently acquired mutations in the same cell may be suf Over time, cells acquire mutations. Two independently acquired mutations in the same cell may be suf
What would your average (mean) number of cells per cluster be? What would your average (mean) number of cells per cluster be?
Video: Major Elements in Biological Molecules: Lipids

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