Digestive System of Earthworm MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
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6 Questions around this concept.
Solve by difficulty
MEDIUMWhich of the following is not a correct match of the part of alimentary canal in earthworm, its location and function?
One very special feature in the earthworm Pheretima is that:
Which one of the following structures in Pheretima is correctly matched with its function?
One very special feature of the earthworm Pheretima is that
Select Incorrect statement regarding the intestine of earthworm.
Concepts Covered - 0
Alimentary Canal of Earthworm
Alimentary Canal of Earthworm
- The alimentary canal is a straight tube that runs between the first segment to the last segment of the body of an earthworm
- The buccal cavity is situated in 1-3 segments
- It is followed by the muscular pharynx
- The pharynx is followed by an oesophagus in 5-7 segments
- It is followed by a muscular gizzard in 8-9 segments
- Gizzard helps in grinding the soil particles and decaying leaves
- Gizzard continues into stomach that extends from 9-14 segments
- Stomach contains calciferous glands that neutralise the humic acid present in humus
- The intestines are the major organs that begin from the 15th segment and continue until the last segment
- At segment 26, a pair of the intestinal caecae project from the intestine
- From segment 26 to 35, the intestine shows a characteristic feature called typhlosole
- Typhlosole are the internal medial folds of the dorsal wall
- Typhlosole increases the effective area of absorption in the intestine
- The alimentary canal opens into anus which is a round small aperture
- During digestion, the ingested soil is passed through the digestive track and is digested into small absorbable substances which are absorbed through the membranes of the intestine
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