Nervous System: What It Is, Parts, Function & Disorders - Cleveland Clinic
2023年11月16日 · Your nervous system uses nerve cells called neurons to send signals, or messages, all over your body. These electrical signals travel among your brain, skin, organs, glands and muscles. The messages help you move your limbs and feel sensations, like pain.
Nervous system - Wikipedia
The central nervous system functions to send signals from one cell to others, or from one part of the body to others and to receive feedback. Malfunction of the nervous system can occur as a result of genetic defects, physical damage due to trauma or …
Nerves: Types, Function & Anatomy - Cleveland Clinic
You have nerves throughout your entire body. Nerves send electrical signals that help you feel sensations and move your muscles. Nerves also control body functions like digesting food and maintaining your heart rate. Nerves are one of the foundational parts of your nervous system.
Nervous System Anatomy, Diagram & Function - Healthline
2018年2月5日 · 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, and...
human nervous system - Encyclopedia Britannica
Human nervous system, the series of cells and nerve tracts that conduct stimuli from sensory receptors in the periphery to receptors in the brain and spinal cord and then conduct impulses back to other body parts.
Nervous system | Definition, Function, Structure, & Facts | Britannica
2024年10月30日 · A nervous system can be defined as an organized group of cells, called neurons, specialized for the conduction of an impulse—an excited state—from a sensory receptor through a nerve network to an effector, the site at which the response occurs.
Overview of the nervous system: Structure and function - Kenhub
2023年11月3日 · Neurons, or nerve cell, are the main structural and functional units of the nervous system. Every neuron consists of a body (soma) and a number of processes (neurites). The nerve cell body contains the cellular organelles and is where neural impulses (action potentials) are generated.
Nervous System - The Definitive Guide | Biology Dictionary
2021年2月10日 · 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. It is primarily made of a single type of cell called the neuron.
Nervous System (Human Anatomy): Functions, Organs, Diseases - WebMD
2023年5月12日 · Fibers called nerves carry important messages back and forth between your body and your brain. That network -- your nervous system -- has two parts: Your brain and spinal cord make up your...
In brief: How does the nervous system work?
2023年5月4日 · There are many billions of nerve cells, also called neurons, in the nervous system. The brain alone has about 100 billion neurons in it. Each neuron has a cell body and various extensions. The shorter extensions (called dendrites) act like antennae: they receive signals from, for example, other neurons and pass them on to the cell body.