Valve mechanism in veins, illustration. Veins are blood vessels with relatively thin wall and with valves (flaps) that prevent the backflow (arrows) o

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Valve mechanism in veins, illustration. Veins are blood vessels with relatively thin wall and with valves (flaps) that prevent the backflow (arrows) of deoxygenated blood as it is returned from the body to the heart-lung system.

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Size: 3661px × 4843px
Photo credit: © HENNING DALHOFF/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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