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Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Cation binding and exchange. Cation binding and exchange.
Mutualisms, such as those that occur among plants and pollinators, generally involve large numbers o Mutualisms, such as those that occur among plants and pollinators, generally involve large numbers o
Gas exchange Gas exchange
Sibling relationships can be intense, in terms of both having fun together and engaging in conflict. Sibling relationships can be intense, in terms of both having fun together and engaging in conflict.
The Economics of Money, Banking and Financial Markets, Business School Edition The Economics of Money, Banking and Financial Markets, Business School Edition
Flexible exchange rates are supposed to prevent long-term trade deficits. Flexible exchange rates are supposed to prevent long-term trade deficits.
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