Conditions of Use
In addition to the cell body, neurons are made up of “axons” and “dendrites”. The area where an axon touches a dendrite is called a “synapse”. Dendrites receive information (electric impulses) from axons of other neurons at the level of the synapse. They then transmit this information to the axon of the cell they belong to, which in turn sends the information to another neuron and repeat this process until the information arrives to the muscle.
The myelin sheath, produced by Schwan cells, insulates the axons. Myelin forms nods around the axons called “Ranvier’s nodes”.
This speeds up the process of sending information to the muscle as the electric impulses jump from node to node instead of going straight through the axon.
The axons and dendrites are made up of “microtubules” and “Neurofilaments”. The microtubules transport organelles through the neuron. Neurofilaments do the same thing but they also create “neurofibril”, a fiber that supports the neuron and gives it its shape.
1. Astrocytes provide physical and nutritional support for neurons, Clean up waste, Transport nutrients to neurons, Digest parts of dead neurons.
2. Microglia digests parts of dead neurons
3. Oligodendroglia produces the myelin sheath and provides axons of the central nervous system insulation.
4. Schwan cells produce the myelin sheath and provide axons of the peripheral nervous system insulation.
Article posted January 10, 2012 at 01:41 AM •
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