nervous tissue

Nervous Tissue

College of Medical Laboratory Science

, OUTLINE

I. Introduction
II. Membrane Potential
III. Development of the Nerve Tissue
IV. Cells of the CNS & PNS
A. Neuron/nerve cells (Soma, Dendrites, Axons)
1. According to the number of processes
2. According to function
B. Neuroglia
1. CNS Neuroglia/glial cells
1. Astrocytes
2. Oligodendrocytes
3. Ependymal cells
4. Microglial cells
2. PNS Neuroglia
1. Schwann cells
2. Satellite cells

,Nerve tissues
• Formed by a network of many billion nerve cells
(neurons) & assisted by many more supporting
GLIAL cells.
• Synthesis and conduction of impulses : provide
stimuli
• Coordinate the functions of other organ
systems

2 divisions of Nervous system
1. CNS : brain & spinal cord
2.PNS : peripheral nerves (Spinal nerves,
cranial nerves)

**Ganglia, small group of nerve cells outside the
CNS

, Two major cells in the CNS & PNS:
A. Nerve cells/ Neurons
– Functional unit/ cell of the nervous
system
– Usually show numerous long processes
– Coordinate the functions of other organ
systems
B. Glial cells/ Neuroglia
– Supportive cell of the nervous system
– short processes
– support & protect neurons
– participate in neural activity
– neural nutrition
– defend the cells in the CNS
– Non conductive