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#Unit 7. System Physiology – Animal

Microglia 

arise from macrophages outside of the nervous system are scavenger cells that resemble tissue macrophages and remove debris resulting from injury, infection, and disease.

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#Unit 7. System Physiology – Animal

There are three types of macroglia:

Oligodendrocytes

Schwann cells

Astrocytes

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#Unit 7. System Physiology – Animal

Oligodendrocytes are involved in myelin formation around axons in the CNS.

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#Unit 7. System Physiology – Animal

Schwann cells are involved in myelin formation around axons in the peripheral nervous system.

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#Unit 7. System Physiology – Animal

Astrocytes, which are found throughout the brain, are of two subtypes:

Fibrous astrocytes

Protoplasmic astrocytes

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#Unit 7. System Physiology – Animal

Fibrous astrocytes, contain many intermediate filaments are found primarily in white matter.Protoplasmic astrocytes are found in gray matter and have a granular cytoplasm.