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the main vein that returns deoxygenated blood from the lower parts of the body to the right atrium of the heart.
chisel-shaped teeth found at the front of the mammalian jaw, used to bite and cut off pieces of...
the muscular tube of the mammalian digestive tract that links the mouth to the stomach.
an organic compound that always contains the elements carbon, hydrogen, oxygen and nitrogen and...
involuntary muscle found in the walls of blood vessels, in digestive, respiratory, urinary and...