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HomeHomework HelpbiologyNervous System

Nervous System

The nervous system is a complex network of cells and tissues that coordinates and regulates bodily functions by transmitting signals between different parts of the body. It consists of the central nervous system (brain and spinal cord) and the peripheral nervous system, which includes all other neural components.

beginner
3 hours
Biology
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Overview

The nervous system is a vital part of the human body, responsible for coordinating actions and processing information. It consists of two main parts: the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS), which connects the CNS to the res...

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Key Terms

Neuron
A nerve cell that transmits electrical signals in the body.

Example: Motor neurons control muscle movements.

Synapse
The junction between two neurons where communication occurs.

Example: Neurotransmitters are released at the synapse.

Neurotransmitter
Chemicals that transmit signals across a synapse.

Example: Dopamine is a neurotransmitter involved in reward.

Central Nervous System (CNS)
The part of the nervous system consisting of the brain and spinal cord.

Example: The CNS processes sensory information.

Peripheral Nervous System (PNS)
The part of the nervous system outside the CNS, connecting it to limbs and organs.

Example: The PNS includes sensory and motor neurons.

Autonomic Nervous System
A division of the PNS that controls involuntary bodily functions.

Example: The autonomic system regulates heart rate.

Related Topics

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The endocrine system regulates bodily functions through hormones, working alongside the nervous system.
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Understanding the structure of the brain is essential for studying its functions and disorders.
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Neuroplasticity
Neuroplasticity is the brain's ability to reorganize itself, crucial for learning and recovery from injury.
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Key Concepts

neuronscentral nervous systemperipheral nervous systemsynapses