Where does esophagus open in the alimentary canal of earthworm?
Correct answer: B. intestine
- A. Buccal chamber
- B. intestine
- C. rectum
- D. intestinal caccum
Explanation
In earthworms, the esophagus connects the pharynx to the crop and then continues to the gizzard. The gizzard is a muscular organ that grinds the food into smaller particles before it enters the intestine, where digestion and absorption take place.The correct answer is Option B: intestine. The esophagus in an earthworm does not open directly into the intestine, but it connects the pharynx to the crop where food is temporarily stored. Options A, C, and D are incorrect because they do not accurately describe the location where the esophagus opens in the earthworm's alimentary canal.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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The human digestive system breaks food into absorbable molecules through mechanical processing, enzyme action and chemical conditions along the alimentary canal. Questions cover the mouth, stomach, small and large intestines, liver, pancreas and associated secretions, including the digestion and absorption of carbohydrates, proteins, lipids, vitamins, minerals and water.
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