Question

write in short about the CNS.​

Answer 1

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It consists of the brain and spinal cord. The CNS is the integration and command centre of the body. It is connected to the various body organs through nerves.

Answer 2

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✨ Write in short about the CNS.

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• The central nervous system consists of the brain and spinal cord.

• The brain plays a central role in the control of most bodily functions, including awareness, movements, sensations, thoughts, speech, and memory.

• Some reflex movements can occur via spinal cord pathways without the participation of brain structures.

• The spinal cord is connected to a section of the brain called the brainstem and runs through the spinal canal.

• Cranial nerves exit the brainstem.

• Nerve roots exit the spinal cord to both sides of the body.

• The spinal cord carries signals (messages) back and forth between the brain and the peripheral nerves.

• Cerebrospinal fluid surrounds the brain and the spinal cord and also circulates within the cavities (called ventricles) of the central nervous system.

• The leptomeninges surround the brain and the spinal cord.

☕ The cerebrospinal fluid circulates between 2 meningeal layers called the

1. Pia matter and
2. The arachnoid (or pia-arachnoid membranes).

• The outer, thicker layer serves the role of a protective shield and is called the dura matter.

• The basic unit of the central nervous system is the neuron (nerve cell).

• Billions of neurons allow the different parts of the body to communicate with each other via the brain and the spinal cord.

• A fatty material called myelin coats nerve cells to insulate them and to allow nerves to communicate quickly.