1. Nervous Tissue

2. Nervous Tissue
Nervous tissue is the main component of the nervous system—the brain, spinal cord, and nerves—which regulates and controls body functions.
It contains two major cell types:
Neurons - For processing, transfer, and storage of information
Neuroglia – For support, regulation & protection of neurons

3. Nervous Tissue Major cell types
Neurons are highly specialized nerve cells that generate and conduct nerve impulses.
Their processes allow them to respond to stimuli (a role of dendrites) and to transmit electrical impulses over substantial distances within the body (the job of axons, which may be very long and myelinated, that is, covered with a fatty sheath that increases the speed of nerve transmission).

4. Neuron structure

5. Neuroglia Clear debris and damaged structures in CNS,
which are the phagocytes of the CNS
provide structural and
metabolic support for neurons
lining brain cavities and central canal in spinal cord.
Produce the myelin sheath in CNS
Produce the myelin sheath in the PNS – Aid in cleaning up the PNS debris – Guide the regrowth of PNS axons.
Provide a controlled microenvironment around the neuron.

6. Function of the Nervous System
sensory input
motor input
sensory receptor
effector
integration

8. Sub-Chapter Test