What type of cell in the central nervous system participates in the formation of the blood-brain barrier

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully