Question

nervous system of cokcroch ​

Answer 1

The Nervous System of Cockroach can be Divisible into Three Parts:

(i) The central nervous system,

(ii) Peripheral nervous system,

The central nervous system of cockroach (Fig. 1.2) consists of the

......supra-oesophageal or.....cerebral ganglia, .....sub-oesophageal ganglia and....circum oesophageal connectives in the head and a double ganglionated ventral nerve cord in the thorax and abdomen.

The brain or supra-oesophageal ganglia are a pair of large, closely apposed ganglia in the head.

From the lower side of the brain arises a pair of short, thick circum-oesophageal connective which run round the oesophagus and meet the sub-oesophageal ganglia.

The sub- oesophageal ganglia are a pair of large ganglia present on the ventral side of oesophagus.

The ventral nerve cord runs along the ventral wall of thorax and abdomen and possesses nine fused ganglia, out of which three are thoracic and six are abdominal in position.....