Describe the digestive system in earthworm. Give suitable diagram.
Answers
Answer:
Digestive system of earthworm consists of alimentary canal and glands along with physiology of digestion.
Alimentary Canal
Alimentary canal is long and straight,extending from mouth to anus. It consists of following parts:
Mouth : 1st segment
Buccal Cavity : 2nd-3rd segment or middle of 3rd segment
Pharynx : 3rd-4th segment
Oesophagus : 5th -7th segment
Gizzard : 8th or 8th-9th segment
Stomach : 9th or 10th-14th segment
Intestine : 15th up to last segment except anus
Anus : last segment
The digestive system consists of the pharynx, the esophagus, the crop, the intestine and the gizzard. Food such as soil enters the earthworm's mouth where it is swallowed by the pharynx. ... The earthworm has a closed circulatory system. An earthworm circulates blood exclusively through vessels.