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a strong ring of smooth muscle at the end of the pyloric canal which lets food pass from the stomach to the duodenum.
the blood vessel that carries blood from the liver to the inferior vena cava.
the cell organelle responsible for manufacturing and transporting protein and lipids.
the ability of a liquid to spontaneously rise up a narrow space, such as that found in xylem...
the movement of an organism in response to a one-directional source of light when the stimulus...