Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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There are more sensory neurons in the tongue than in any other part of 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.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
An ECG strip showing a normal sinus rhythm with the P wave, QRS complex, and T wave identified.
Energy Metabolism During Exercise
U.S. Energy Consumption
Complex Linguistic Patterns
States that require licensing or certification. Graphic provided by Associated Bodywork & ...