The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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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.
Growth pattern of stem cells
Imaging cell surface glycoproteins in living cells
In oogenesis, cells enter meiosis as primary oocytes
