What is spinal cord Class 9?

What is spinal cord?

Anatomical terminology. The spinal cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. It encloses the central canal of the spinal cord, which contains cerebrospinal fluid.

What is spinal cord in short answer?

A column of nerve tissue that runs from the base of the skull down the center of the back. It is covered by three thin layers of protective tissue called membranes. The spinal cord and membranes are surrounded by the vertebrae (back bones).

What are the functions of spinal cord Class 9?

The main functions of the spinal cord are:

  • To conduct reflexes below the neck.
  • To conduct messages from the skin and muscles to the brain.
  • To conduct commands from the brain to muscles of the trunk and limbs.

What are the two main functions of spinal cord Class 11?

The spinal cord’s major functions include:

  • Electrochemical communication. Electrical currents travel up and down the spinal cord and across nerves, sending signals which allow different segments of the body to communicate with the brain.
  • Walking. …
  • Reflexes.
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What are parts of spinal cord?

The spinal cord is divided into four different regions: the cervical, thoracic, lumbar and sacral regions (Figure 3.1).

Why does the spinal cord hurt?

Conditions commonly linked to back pain include: Muscle or ligament strain. Repeated heavy lifting or a sudden awkward movement can strain back muscles and spinal ligaments. If you’re in poor physical condition, constant strain on your back can cause painful muscle spasms.

What are the layers of the spinal cord?

Three layers of membranes known as meninges protect the brain and spinal cord. The delicate inner layer is the pia mater. The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain. The tough outer layer is called the dura mater.

What is spinal cord Class 8?

It is a tubular bundle of nervous tissue that extends from the brainstem to the lumbar vertebrae and supports cells. The central nervous system is made of the spinal cord and the brain. In the spinal cord thirty-one pairs of spinal nerves originate: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1 coccygeal.

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