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Author Question: A(n) ________ virus killed an estimated 130,000 people in North America in the 1770s and 1780s. ... (Read 33 times) |
The human body produces and destroys 15 million blood cells every second.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
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.