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Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

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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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Everyone has one nostril that is larger than the other.

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In 1864, the first barbiturate (barbituric acid) was synthesized.

Frequency coding in the nervous system: Threshold stimulus. Frequency coding in the nervous system: Threshold stimulus.
Ribs and intercostal muscles Ribs and intercostal muscles
Selected skeletal muscles (anterior view). Selected skeletal muscles (anterior view).
Alternate kneading and shaking the thigh muscles. (A) Perform two-handed kneading over the lateral, ... Alternate kneading and shaking the thigh muscles. (A) Perform two-handed kneading over the lateral, ...
Apply kneading and deep stroking to lower arm muscles. (A) Knead muscle bellies. (B) Thumb press ... Apply kneading and deep stroking to lower arm muscles. (A) Knead muscle bellies. (B) Thumb press ...
The U.S. military uses its own marking system to identify explosive hazards (left), chemical hazards ... The U.S. military uses its own marking system to identify explosive hazards (left), chemical hazards ...
Video: Four Giant Convection Cells oF Earth

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