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healthy (blood (55% plasma and 45% red blood cells+platelets+white blood…
healthy
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veins,arteries and capilliaries
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vaccinations
they make you immune because the lymphocytes can create the right antibodies for the antigens and they remember what the antigens look like so that they can create the right antibodies when they encounter them.
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respiration
Aerobic respiration needs oxygen, and it produces carbon dioxide as a waste product.
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during an asthma attack
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the muscles around the bronchioles contract, which constricts the airways
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