An overview of the nervous system of the human body

It contains ions, nutrients, oxygen, and albumins that support the chemical and osmotic balance of nervous tissue. What are known as the special senses—vision, taste, smell, hearing, and balance—are all detected by specialized organs such as the eyestaste budsand olfactory epithelium.

Experimental studies have shown that spinal nerve fibers attempt to regrow in the same way as nerve fibers, but in the spinal cord, tissue destruction usually produces scar tissue that cannot be penetrated by the regrowing nerves.

An Online Examination of Human Anatomy and Physiology

Neurones are shaped differently depending on where they are in the body and what role they play. The circuit begins with sensory receptors in the skin that are activated by harmful levels of heat: Each neuron in the body is surrounded by anywhere from 6 to 60 neuroglia that protect, feed, and insulate the neuron.

Oculomotor, trochlear, and abducens nerves III, IV, and VI all work together to allow the brain to control the movement and focus of the eyes. The ENS receives signals from the central nervous system through both the sympathetic and parasympathetic divisions of the autonomic nervous system to help regulate its functions.

Induction of neural tissue requires inhibition of the gene for a so-called bone morphogenetic proteinor BMP.

Outline of the human nervous system

It can stimulate tissues to produce hormones and enzymes. The SNS is the only consciously controlled part of the PNS and is responsible for stimulating skeletal muscles in the body. The axon feathers out and has a number of bumps on it.

Free nerve endings are simply free dendrites at the end of a neuron that extend into a tissue. The accessory nerve XI controls the movements of the shoulders and neck.

Nervous System

Neurons Neurons, also known as nerve cells, communicate within the body by transmitting electrochemical signals. The spinal nerves are mixed nerves that carry both sensory and motor signals between the spinal cord and specific regions of the body.

The optic nerve II carries visual information from the eyes to the brain. Photoreceptors in the retina detect light to provide the sense of vision. Experimental studies have shown that spinal nerve fibers attempt to regrow in the same way as nerve fibers, but in the spinal cord, tissue destruction usually produces scar tissue that cannot be penetrated by the regrowing nerves.

Nervous system

This concentration is maintained by the sodium-potassium pump of the cell membrane which pumps 3 sodium ions out of the cell for every 2 potassium ions that are pumped into the cell.

The central nervous system is protected by major physical and chemical barriers. In some animals, however, another type of molecule called Fibroblast Growth Factor or FGF may also play an important role in induction. If an injury to the spine produces nothing worse than swelling, the symptoms may be transient, but if nerve fibers in the spine are actually destroyed, the loss of function is usually permanent.

CSF helps to maintain chemical homeostasis within the central nervous system. Human nervous system – the part of the human body that coordinates a person's voluntary and involuntary actions and transmits signals between different parts of the body.

The human nervous system consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The nervous system uses electrical and chemical means to help all parts of the body to communicate with each other. The brain and spinal cord make up the central nervous system.

Nerves everywhere else in the body are part of the peripheral nervous system. The nervous system helps all the parts of. The nervous system uses electrical and chemical means to help all parts of the body to communicate with each other.

The brain and spinal cord make up the central nervous system. Nerves everywhere else in the body are part of the peripheral nervous system. The nervous system helps all the parts of.

The nervous system has two major parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The central system is the primary command center for the body.

The nervous system is the complete network of nerve cells (neurons).

Nervous System

It includes the brain, the spinal cord, the nerves and all the sensory neurons in the body. In short the nervous system is what makes us human.

The nervous system has two major parts: the central nervous system (CNS) and the peripheral nervous system (PNS).

Why is the nervous system the most important system in our body?

The central system is the primary command center for the body, and is comprised of the brain and spinal cord. The peripheral nervous system consists of a network of nerves that connects the rest of the body to the CNS.

An overview of the nervous system of the human body
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