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chisel-shaped teeth found at the front of the mammalian jaw, used to bite and cut off pieces of food.
a biological membrane that separates the interior of all cells from the outside environment.
the process whereby a particular change causes a response which reverses that change.
(also called polymers) large, more complex molecules formed when monomers join together.
coiled nephron tubule which extends from Bowman's capsule to the loop of Henlé.