a form of immunisation in which killed or weakened micro-organisms are placed into the body, where antibodies against them are developed; if the same types of micro-organisms enter the body again, they will be destroyed by the antibodies
the process through which oxygen and carbon dioxide are exchanged between the lungs and the air; also refers to the use of a machine to carry out this process in someone who cannot breathe on his or her own
a group of vitamins including thiamine, niacin, riboflavin, pantothenic acid, pyridoxine, biotin, and folic acid; plays a variety of important roles in the body, including in hormone production, metabolism, and functioning of the nerves, muscle, heart, and digestive system
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