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structure that contains the two centrioles arranged at right angles to each other in animal cells.
a foreign substance, usually a protein, that stimulates the production of one or more antibodies...
an infection of the skin, caused by a parasitic mould. It causes small, red itchy circles on the...
the end part of the digestive system that consists of the caecum, colon, rectum and anus.
waste water from sinks, washing machines, dishwashers, showers and baths, which can be used for...