write a short note on nervous system of cockroach?
Answers
The Nervous System of Cockroach can be Divisible into Three Parts:
(i) The central nervous system,
(ii) Peripheral nervous system,
(iii) Visceral or sympathetic nervous system.
The central nervous system of cockroach 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.
Nervous System of Cockroach
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.
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ANSWERS:-
NERVOUS SYSTEM OF COCKROACH
The nervous system of cockroach consist 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.
⚡The nervous system of cockroach is spread throughout the body.
⚡The head holds a bit a nervous system while the rest is situated along the ventral part of its body. This is reason for survival of cockroach for one week even if the head of the cockroach is cut off.
⚡In the head region, the brain is represented by supraoesophageal gangia which supplies nerves to antennae and compound eyes