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Did you know?
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Did you know?
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
Did you know?
There are 60,000 miles of blood vessels in every adult human.