Bacteria in the blood can be prevented entry to the fluids surrounding the brain.
which cells are most responsible for preventing bacteria from entering the fluids of the brain?
a) satellite cells
b) astrocytes
c) schwann cells
d) oligodendrocytes

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The cells are most responsible for preventing bacteria from entering the fluids of the brain is astrocytes.

Astrocytes (Astro from Greek astron = star and cyte from Greek "kyttaron" = cell), also known collectively as astroglia, are characteristic star-shaped glial cells in the brain and spinal cord. The proportion of astrocytes in the brain is not well defined.