The main tissue of our nervous system is the nervous or nerve tissue. It regulates and monitors the body’s functions. Nervous tissue comprises of 2 cells which are named as
- Nerve cells or neurons
- Glial cells
Nerve cells help to transfer nerve impulses as well as provides nutrients to neurons. Brain, Nerves and spinal cord are made up of nervous tissue, skilled in being stimulated to quickly transfer information from one portion of the body to the other.
Location of Nervous tissues
- The nervous tissue is found in the body in the peripheral nerves and throughout the central nervous system organs such as the spinal cord and brain.
- The nervous tissue is composed of neurons.
- Neurons are specialised cells which respond to stimuli by producing signals via the axons, that are elongated structures arising from the cell body.
Structure of Nervous tissues
- It is composed of neurons or nerve cells, both of which consist of an axon. Axons are long stem projections that arise from the cell and are responsible for interacting with other cells known as the Target cells, thus transmitting on impulses.
- The main component is the body of cells that includes the nucleus, cytoplasm and organelles of the cells. Cell membrane extensions are considered processes.
- Dendrite is a process that is strongly branched, responsible for processing input from other neurons and synapses. Dendrites include details of other neurons to communicate with its cell body.
- Input in a neuron becomes unidirectional because it travels via neurons from dendrites across the cell body down the axon.
Nervous Tissue Function
- Neurons generate nerve impulses and they carry them out. They produce electrical signals that are transmitted over distances, by secreting neurotransmitters of chemical substances.
- Carries out interaction and integration
- Responds to stimuli
- Provides electrical insulation to nerve cells and helps remove debris
- Nervous tissues carry information from other neurons into the cell body.