the upper surface of the ground water.
the main supporting cells of neurons in the peripheral nervous system (PNS).
tissue that covers the outside of an organism.
an artificial device that helps to stimulate and regulate the heart muscle.
a sac-like structure in plant cells that contains the cell sap. It supports the cell and helps...
a disease caused by the bacterium Vibriocholera, which produces a toxin in the lining of the...
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