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drugs that are used to treat infections caused by bacteria. Many antibiotics are produced by...
proteins that identify and neutralise foreign and potentially harmful antigens by binding onto...
a hormone produced by the pituitary gland, which helps to limit the amount of water lost from...
a foreign substance, usually a protein, that stimulates the production of one or more antibodies...
external opening of the rectum (part of the mammalian digestive tract) through which faeces are...