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

  1. A
    the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
  2. B
    the cockroach does not have nervous system.
  3. C
    the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
  4. D
    the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.

Solution & Step-by-step Explanation

The nervous system of a cockroach is spread throughout the body. The head holds a bit of a nervous system (supra-oesophageal ganglion) while the rest is situated along the ventral (belly-side) part of its body. Therefore, if the head is cut off, it will still live for as long as one week.

Practice this question

Try it yourself before checking the explanation above.

If the head of cockroach is removed, it may live for few days because:
A
the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
B
the cockroach does not have nervous system.
C
the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
D
the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.

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Structural Organisation in AnimalsCockroach

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