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Question

In pheretima removal of these ganglia results in the loss of motor control.
  1. Sub- pharyngeal ganglia
  2. Sub- oesophageal ganglia
  3. Supra- pharyngeal ganglia
  4. Supra- oesophagal ganglia

A
Supra- pharyngeal ganglia
B
Supra- oesophagal ganglia
C
Sub- pharyngeal ganglia
D
Sub- oesophageal ganglia
Solution
Verified by Toppr

The nervous system in Annelida is made up of a cerebral ganglia and a ring of nerves around the pharynx which connects the brain to the sub-pharyngeal ganglia. Stimuli from the skin are transmitted by sensory fibres to the nerve cord. Ganglia change the sensory impulse into motor impulse which passes on to the muscle cells. In Pheretima, the removal of sun pharyngeal ganglia will result in loss of motor controls.

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