Briefly explain the role of nervous in nervous system
Answers
Answer:ROLE OF NERVES IN NERVOUS SYSTEM
Explanation:
Nerves carry impulses from sensory organs to the brain and from brain to effectors.
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→ It consists of segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side.
→ 3 ganglia lie in the thorax, and 6 in the abdomen.
→ So, if the head of a cockroach is cut off, it will still live for one week.
→ The supra-oesophageal ganglion (brain) supplies nerves to antennae and compound eyes.
→ Sense organs:- Antennae, eyes, maxillary palps, labial palps, anal cerci, etc.
→ Sensory receptors of antennae monitor the environment.
→ Each compound eye consists of about 2000 hexagonal ommatidia.
→ Using these, a cockroach can receive several images of an object. This is known as mosaic vision.
→ It has more sensitivity but less resolution, being common during night.