JACOPIN / SCIENCE PHOTO LIBRARY JACOPIN / SCIENCE PHOTO LIBRARY
BLOOD VESSEL, DRAWING Blood vessel. Anatomy of a blood vessel showing the various layers, from right to left: - Capillary blood vessels (upper right-hand corner) - Tunica adventitia or adventitia (two tissue types, collagen and elastic tissue) (red) - External elastic tissue (yellow) - Tunica media or media (smooth muscle layer) (pinkish red) - Tunica intima or intima: - Internal elastic tissue (yellow) - Basement membrane (orange) - Endothelial layer (pink cells) - Arterial lumen.
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