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Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

16 weeks old human fetus 16 weeks old human fetus
Human embryonic stem cells Human embryonic stem cells
Components of the Human Body Components of the Human Body
(a) Blue arrows (right side): External components of the innate immune system: human body with skin, ... (a) Blue arrows (right side): External components of the innate immune system: human body with skin, ...
Some obesity genes in the human genome. The green triangles represent single genes in which obesity Some obesity genes in the human genome. The green triangles represent single genes in which obesity
The Anatomic Dimensions of the Vertebral Column (Anterior, Left Lateral, and Posterior) The Anatomic Dimensions of the Vertebral Column (Anterior, Left Lateral, and Posterior)
Video: Embryonic development - Weeks 5 to 8

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