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Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
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?
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.