Same chapter3 marksDifficulty: Medium
Describe the circulatory system of the cockroach.
Structural Organisation in Animals
3 marksDifficulty: Medium
Describe the digestive system of the earthworm in outline.
Original Khojo Papers practice question — not from a past board paper.
Answer
The alimentary canal runs straight from mouth to anus and consists of mouth, buccal cavity, pharynx, oesophagus, gizzard, stomach, intestine and anus. The gizzard grinds the soil and organic matter, and the intestine has a typhlosole, a fold that increases the surface for absorption.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The earthworm feeds on decaying organic matter in the soil it swallows.
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