Digestive System of Earthworm (Pheritima posthuma) | Biology Class 11

Zoology | Notes

Digestive System of Earthworm (Pheritima posthuma)
Class : 11

The process of ingestion, digestion, absorption, and excretion is called digestion. The digestive system is divided into following heads. 

Alimentary Canal: The alimentary canal is long tube, which starts from mouth and ends to anus. 

Mouth: Mouth is small cresentric aperture. It is situated below prostomium at first segment. 

Buccal Cavity: It is thin walled, short tube behind mouth, which extends upto 3rd segment. It helps to ingest food.

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