Q:

Which tunic(s) are ABSENT from the walls of blood capillaries?

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Which tunic(s) are ABSENT from the walls of blood capillaries?


  1. tunica intima
  2. tunics externa and intima
  3. tunics media and externa
  4. tunics interna and media

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C: Capillaries are thin-walled vessels that only have the tunica intima (= interna) in their walls. Hence the tunica media and tunica externa are absent.

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