There are more bacteria in your mouth than there are people in the world.
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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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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
The lymphatic system
reaction system of photosynthesis
Venous System Anatomy
Properties of the Magnocellular, Parvocellular, and Koniocellular Divisions of the Visual System