perithelial

/ˌpɛrɪˈθiliəl/
adjective
  1. Relating to the layer of tissue that surrounds small blood vessels or other structures.
    • Damage to perithelial tissue can affect blood flow in the brain.
    • The perithelial cells help support the walls of tiny capillaries.
    • Researchers studied the perithelial layer to understand how nutrients pass through vessel walls.