Q2. Compare the following:
(a) Central neural system (CNS) and Peripheral neural system (PNS)
Central Neural System (CNS) |
Peripheral Neural System (PNS) |
1. CNS is made of the brain and the spinal cord. | 1. PNS consists of cranial nerves and spinal nerves. |
2. Brain is protected by the skull and the spinal cord by the vertebral column. | 2. There are no protective structures for PNS. |
3. CNS does not have any subdivisions. | 3. PNS is divided into somatic nervous system and autonomic nervous system. |
4. CNS processes the information and controls the response to impulses. | 4. Nerves of PNS carry impulses to the CNS and responses from the CNS to different organs of the body. |
5. Group of neurons in CNS is called nuclei. | 5. Group of neurons in PNS is called ganglia. |