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the brain and the spinal chord.
part of cellular respiration: a cyclical series of reactions in which the pyruvic acid formed in...
an injection of a weakened or dead pathogen into the body to build up immunity against a disease...
tough cartilage that acts as a shock absorber between vertebrae and at the ends of bones in ball...
water that falls to earth in any form, such as rain, snow, hail and sleet.
the windpipe or tube that carries air. It is kept open by C-shaped rings of cartilage.