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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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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.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
Gunnera growing on nitrogen-poor soil.
A typical injector-pump-type automotive diesel fuel injection system.
A typical engine design that uses both pressure and splash lubrication. Oil travels under pressure ...
Typical optical distributor.
A typical good oxygen sensor waveform as displayed on a digital storage oscilloscope. Look for ...
The typical distribution of neurofibrillary tangles and amyloid plaques in the brains of patients ...