Structure and Function of Spinal Cord

The spinal cord is a long, fragile tubelike structure that begins at the end of the brain stem and continues down almost to the bottom of the spine. The spinal cord consists of nerves that carry incoming and outgoing messages between the brain and the rest of the body. It is also the center for reflexes, such as the knee jerk reflex.
ike the brain, the spinal cord is covered by three layers of tissue (meninges). The spinal cord and meninges are contained in the spinal canal, which runs through the center of the spine. In most adults, the spine is composed of 33 individual back bones (vertebrae). Just as the skull protects the brain, vertebrae protect the spinal cord. The vertebrae are separated by disks made of cartilage, which act as cushions, reducing the forces generated by movements such as walking and jumping. The vertebrae and disks of cartilage extend the length of the spine and together form the vertebral column, also called the spinal column.
Spinal nerves: Emerging from the spinal cord between the vertebrae are 31 pairs of spinal nerves. Each nerve emerges in two short branches (roots):
One at the front (motor or anterior root) of the spinal cord
One at the back (sensory or posterior root) of the spinal cord
The motor roots carry commands from the brain and spinal cord to other parts of the body, particularly to skeletal muscles.
The sensory roots carry information to the brain from other parts of the body.
Cauda equina: The spinal cord ends about three fourths of the way down the spine, but a bundle of nerves extends beyond the cord. This bundle is called the cauda equina because it resembles a horse’s tail. The cauda equina carries nerve impulses to and from the legs.
#CentralNervousSystem
#SpinalCord

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.

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Arachnoid and pia matter to brain ko cover krte hai??

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Cerebral cortex and function

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A protective layer for both....

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Because it contains cell bodies mainly, not the axons.
Due to mylene sheath, axon gives white/fatty color to white matter while grey matter has cell bodies and combinely giving grey color to grey matter.

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These nerve called spinal nerve

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