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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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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.