describe nervous system of cockroach

Nervous System

• Consists of a series of fused segmentally arranged ganglia (joined by paired longitudinal connectives on the ventral side).

• Three ganglia lie in the thorax and six in the abdomen

• Spreads throughout the body, with the head holding just a bit of the nervous system

• In the head, the brain is represented by the supra-oesophageal ganglion which supplies nerves to the antennae and the compound eyes.

• Sense organs:

  • Compound eye − composed of 2000 hexagonal ommatidia (cockroach has mosaic vision and is nocturnal)

  • Antennae

  • Maxillary palps

  • Labial palps

  • Anal cerci