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Author Question: The great contribution of Tycho Brahe was to A) observe planetary positions with sufficient ... (Read 36 times) |
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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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The longest a person has survived after a heart transplant is 24 years.