Brain Cells
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Neuron
The brain’s main signaling cell. Neurons transmit information using electrical impulses and chemical neurotransmitters, forming networks that underlie thought, memory, and behavior.
Astrocyte
Star-shaped support cells that regulate nutrients, maintain the blood–brain barrier, and help control synaptic activity and repair.
Oligodendrocyte
Cells that wrap axons in myelin sheaths, speeding up electrical communication between neurons.
Microglia
The brain’s immune cells. They protect against injury and disease, remove debris, and shape neural connections.





