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Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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

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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Venous return to the heart and blood flow to the lungs. Venous return to the heart and blood flow to the lungs.
Press with (A) fingertips into GB-30; or (B) with thumb into GB-30; press 2–3 times. Press with (A) fingertips into GB-30; or (B) with thumb into GB-30; press 2–3 times.
Types of ecosystem service vs. total global value per year Types of ecosystem service vs. total global value per year
Layers of the heart Layers of the heart
Structural components of the heart Structural components of the heart
Normal heart valves Normal heart valves
Video: How antibiotics works? 💊

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