Quick Answer: What Are The 4 Main Parts Of The Nervous System?

What are the 3 major organs of the nervous system?

The nervous system in a human is made of the brain, spinal cord, sensory organs and all the neurons that serve as communication channels between the various organs of the body..

What is your largest organ?

Skin is the human body’s largest organ. Body organs aren’t all internal like the brain or the heart. There’s one we wear on the outside. Skin is our largest organ—adults carry some 8 pounds (3.6 kilograms) and 22 square feet (2 square meters) of it.

What are the main parts of the nervous system?

The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

What are the main parts of the nervous system and what do they do?

The central nervous system (CNS) is made up of the brain, cerebellum and the spinal cord.Nerves make up the peripheral nervous system (PNS), which works to send signals to and from the CNS, the body’s organs, muscles, and senses.More items…•

What part of brain controls nervous system?

The pons and the medulla, along with the midbrain, are often called the brainstem. The brainstem takes in, sends out, and coordinates the brain’s messages. It also controls many of the body’s automatic functions, like breathing, heart rate, blood pressure, swallowing, digestion, and blinking.

What are the 3 basic functions of the nervous system?

The nervous system has three broad functions: sensory input, information processing, and motor output. In the PNS, sensory receptor neurons respond to physical stimuli in our environment, like touch or temperature, and send signals that inform the CNS of the state of the body and the external environment.

What is a nerve cell called?

The basic unit of communication in the nervous system is the nerve cell (neuron). Each nerve cell consists of the cell body, which includes the nucleus, a major branching fiber (axon) and numerous smaller branching fibers (dendrites).

Is eye part of nervous system?

The Central Nervous System is the integration and command center of the body. It consists of the brain, spinal cord and the retinas of the eyes. The Peripheral Nervous System consists of sensory neurons, ganglia (clusters of neurons) and nerves that connect the central nervous system to arms, hands, legs and feet.

What part of your nervous system does the logical thinking?

central nervousWhen you were trying to think of a question, what part of your nervous system did the logical thinking? The central nervous.

How many types of nervous system are there?

Your nervous system is involved in everything your body does, from regulating your breathing to controlling your muscles to sensing heat and cold. There are three types of nerves in your body: autonomic nerves, motor nerves, and sensory nerves.

What attacks the nervous system?

Guillain-Barré syndrome (GBS) is a rare neurological disorder in which the body’s immune system mistakenly attacks part of its peripheral nervous system—the network of nerves located outside of the brain and spinal cord.

What are the functions of a nervous system?

The nervous system is involved in receiving information about the environment around us (sensation) and generating responses to that information (motor responses). The nervous system can be divided into regions that are responsible for sensation (sensory functions) and for the response (motor functions).

What is the biggest part of the brain?

cerebrumThe biggest part of the brain is the cerebrum. The cerebrum is the thinking part of the brain and it controls your voluntary muscles — the ones that move when you want them to.

Why is the nervous system the most important?

The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages.

What is the smallest organ?

What’s the smallest organ in the human body? You’ll find the pineal gland near the center of the brain, in a groove between the hemispheres.