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the part of the cell that controls all the activities of the cell and plays an important role in cell division.
the process whereby nutrients that have been absorbed from the digestive system are taken up by...
animals with two cellular body wall layers: the ectoderm and endoderm.
small ball of chewed food mixed with saliva that is formed in the mouth, which is swallowed.
the muscular tube of the mammalian digestive tract that links the mouth to the stomach.