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Topic: Animal tissues: epithelial, connective, muscular, neural· Structural Organisation in Animals and Plants

If the head of cockroach is removed, it may live for few days because :

1. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.

2. the cockroach does not have nervous system.

3. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.

4. the head holds a \(1/3^{rd}\) of a nervous system while the rest is situated along the dorsal part of its body.

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Best answer

Answer: 3. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.

Key idea: A cockroach nervous system is distributed along the body.

The head has only the supra-oesophageal ganglia (brain). The rest is a ventral nerve cord with segmental ganglia running through the body. So a headless cockroach can survive for days.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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