Oxygen-free radicals that are very proactive molecules with every cellular module/component
Answer:
There are <em><u>four types of neuroglia</u></em> found within the central nervous system:
<u>Astrocytes</u> :
It maintains the blood brain barrier and preserve the chemical environment by recycling ions and neurotransmitters.
<u>Oligodendrocytes</u> :
The myelinate axons in the central nervous system and provide an overall structural framework.
<u>Ependymal cells</u> :
The line ventricles (brain) and central canal (spine) and are involved in the production of cerebrospinal fluid.
<u>Microglia</u> :
It removes cell debris, wastes and pathogens via phagocytosis.
Similarities:
• the eye and the ear are both passive structures
• the eye and the ear both respond to brain commands
Differences
• eyes relay the location and movement of objects in our visual field and the ears convey information about the actions of objects both in and outside of our visual field
• eyes are designed to sense light, while the ears are equipped to detect sound
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