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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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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.
Blood-typing and cross-reactions: The blood type depends on the presence of surface antigens (agglut
In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai
This slave burial service, painted by John Antrobus in 1860, reflects an inversion of power relation