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Excretion &
Digestion
Arachnids have a one way digestive system and a separate mouth, anus and
coelom. Waste is released from the anus which is located near the abdomen. The organs that spiders use to excrete wastes are the Malipighiam tubules; these organs are like the human kidneys. The tubules create an acid solution that helps make the wastes pass out of the body.
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