What constitutes the peripheral nervous system?

The peripheral nervous system consists of the nerves that branch out from the brain and spinal cord. These nerves form the communication network between the CNS and the body parts. The peripheral nervous system is further subdivided into the somatic nervous system and the autonomic nervous system.

What does the peripheral nervous system consist of?

The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions.

What constitutes the central and peripheral nervous system?

The central nervous system includes the brain and spinal cord, while the peripheral nervous system includes all of the nerves that branch out from the brain and spinal cord and extend to other parts of the body including muscles and organs.

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What are the 3 parts of the peripheral nervous system?

The Peripheral Nervous System (PNS)

  • Autonomic nervous system (ANS): Controls involuntary bodily functions and regulates glands.
  • Somatic nervous system (SNS): Controls muscle movement and relays information from ears, eyes and skin to the central nervous system.

What are pairs of peripheral nervous system?

The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous system. In the somatic nervous system, the cranial nerves are part of the PNS with the exception of the optic nerve (cranial nerve II), along with the retina.

What are two components of the peripheral nervous system?

The peripheral nervous system is further subdivided into the somatic nervous system and the autonomic nervous system. The somatic nervous system consists of nerves that go to the skin and muscles and is involved in conscious activities.

What constitutes the afferent and efferent branches of the competing reflex dilation )?

What constitutes the afferent and efferent branches of the competing reflex (dilation)? The optic nerve still carries the afferent input, but the output is from the thoracic spinal cord, through the superior cervical ganglion, to the radial fibers of the iris.

What constitutes the central and peripheral nervous system How are the components of central nervous system protected class 10?

The central nervous system is protected by the layers called meninges. The brain is enclosed in skull. It is protected by cranium. The spinal cord is protected by vertebral column.

What constitutes the central nervous system class 10?

The brain and spinal cord together constitutes the central nervous system. Central nervous system receives the message from all the parts of the body and integrates it. The spinal cord is a long, tubular bundle of neurons which carry information between the brain and the rest of the body.

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What are the four main divisions of the peripheral nervous system?

The peripheral nervous system is subdivided into nerves, the autonomic system, and the somatic system. The autonomic nervous system is further subdivided into the parasympathetic and sympathetic nervous systems. The enteric nervous system is an independent subsystem of the peripheral nervous system.

What are the 4 types of nerves?

These are the sensory nerves, motor nerves and mixed nerves.

How many types of peripheral nervous system are there?

There are three types of peripheral nerves: motor, sensory and autonomic. Some neuropathies affect all three types of nerves, while others involve only one or two.

How do the two groups of peripheral nerves differ?

How do the functions of the two groups of peripheral nerves differ? The somatic nervous system controls voluntary movements and the automatic nervous system controls involuntary movements.

How many nerves are in the peripheral nervous system?

Cranial nerves emerge from the cranium (brain/brainstem) whilst spinal nerves leave the CNS via the spinal cord. There are 12 pairs of cranial nerves and 31 spinal nerve pairs, giving a total of 43 paired nerves forming the basis of the peripheral nervous system.