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any disease that is caused by a virus or a bacterium or any other micro-organism.
waste water from sinks, washing machines, dishwashers, showers and baths, which can be used for...
a large tongue-shaped organ in the mammalian body which secretes hormones and digestive enzymes...
the very cold zone in an ocean, dam or a lake, located below the range of effective light...
a cluster of capillaries situated inside Bowman's capsule in the nephron.