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flap of connective tissue that closes over the opening to the trachea which prevents food from blocking the air passageways to the lungs
gland that produces hormones that regulate blood sugar; produces enzymes that break down carbohydrates, proteins, lipids, and nucleic acids; and produces sodium bicarbonate, a base that neutralizes stomach acid
small network of capillaries encased in the upper end of a nephron; where filtration takes place
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