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neck gland in children; helps immature immune system make white blood cells; disappears by teen years
found in neck; makes hormone thyroxine which controls the rate of metabolism (how rapidly food is burned)
small 'pyramids' on top of kidneys; hormones aid 'fight or flight' reactions for emergencies
pea-sized; at base of brain; makes growth horone and many other hormones which control other glands; nicknamed master gland
clear fluid in plasma; passes through blood vessels to wash body cells; collects germs for later destruction
found mostly near joints; here white blood cells destroy germs collected by lymph; when ill, becomes swollen with germs
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