write about alimentary canal in earthworm
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Digestive system of Earthworms. The digestive system of earthworm comprises an alimentary canal that runs along the length of the body from mouth to anus and glands.
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The alimentary canal consists of a mouth, buccal cavity (generally running through the first one or two segments of the earthworm), pharynx (running generally about four segments in length), oesophagus, crop, gizzard (usually) and intestine. Food enters at the mouth.
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