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NERVE TISSUE - Coggle Diagram
NERVE TISSUE
6 types of neuroglial cells & its location
Schwann cells
Schwann cells (SCs) are the main glial cells of the peripheral nervous system which wrap around axons of motor and sensory neurons to form the myelin sheath.
Location: Schwann cells are found in close contact with axons in the peripheral nerves. (PNS)
Myosatelite
Myosatelite cells, also known as satellite cells or muscle stem cells, are small multipotent cells with very little cytoplasm found in mature muscle. Satellite cells are precursors to skeletal muscle cells, able to give rise to satellite cells or differentiated skeletal muscle cells.
Location: found in the ganglia of the peripheral nervous system ( PNS)
Ependymal cell
Ependymal cell, type of neuronal support cell (neuroglia) that forms the epithelial lining of the ventricles (cavities) in the brain and the central canal of the spinal cord. This is accomplished through the selective uptake of water and certain other molecules from the blood into the cells.
Location: Ependymal cells are epithelioid and line the ventricles of the brain and the central canal of the spinal cord
Microglial cells
Microglial cells are a specialized population of macrophages. They remove damaged neurons and infections and are important for maintaining the health of the CNS.
Location: found in the central nervous system (CNS).
Oliogendroglia
Oliogendroglia, are a type of neuroglia whose main functions are to provide support and insulation to axons in the central nervous system of some vertebrates, equivalent to the function performed by Schwann cells in the peripheral nervous system.
Location: found only in the central nervous system, which comprises the brain and spinal cord. (CNS)
Astrocytes
Astrocytes are a population of cells with distinctive morphological and functional characteristics that differ within specific areas of the brain.
Location: Astrocytes are star-shaped cells found in the brain
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The difference between neuron & neuroglia
Neuroglia
Axons
Absent
Referred as
They are supporting cells of neurons
Granules
No granules
Size
Smaller than neurons
Definition
They provide mechanical as well as structural support to the neurons
Neurons
Axons
Present
Referred as
The functional unit of the nervous system
Granules
Nissl’s granules
Size
4 micrometer to 1 millimeter
Definition
They receive and transmit nerve impulses
