Match the words to their definitions

• Объекты 1
  • keeps something in place
  • the outside of
  • material
  • level, part
  • the narrow tubes that blood flows through
  • long thin fibres that send messages to the brain / body
  • tightly, safely
• Объекты 2
  • fastens
  • outer
  • substance
  • layer
  • blood vessels
  • nerve
  • securely