Question

Compare nervous system of cockroach with that of humans, with respect to its
(a) location in the body (dorsal/ventral)
(b) parts present in the head, thorax and abdomen.

Answer 1

Answer:

Occipital neuralgia can cause intense pain that feels like a sharp, jabbing, electric shock in the back of the head and neck.

Explanation:

Answer 2

Nervous system:

This system has network of nerves that transmits nerve impulse between parts of the body parts.

(a) Location in the body (dorsal/ventral) :

Humans:

• The spinal cord gives rise to spinal roots which are found in the dorsal and ventral location of the body.
• There are 31 pairs of spinal roots they are 12 thoracic, 8 cervical, 1 coccygeal, 5 sacral and 5 lumbar.
• The corresponding dorsal and ventral roots to form spinal nerve.

Cockroach:

• A muscular wall from the many funnelled chambers lies in the mid-dorsal and ventral region of thorax and abdomen.
• Majority of nerves are found in ventral side of a cockroach.

(b) Parts present in the head, thorax and abdomen:

Humans:

• Cranial nerves are found in the head region.
• Sympathetic ganglia grouped into paravertebral and prevertebral ganglia are found in thorax and abdomen.

Cockroach:

• Supra-oesophageal ganglion is found in the head region.
• Three ganglia and six ganglia are in the thorax and abdomen region respectively.