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Human skull with a colored resin cast of the arteries (red) and veins (blue) in the neck. The veins in the neck drain deoxygenated blood away from the brain. The largest vein visible is the jugular vein.
Ralph Hutchings/Visuals Unlimited, Inc.
all images © Visuals Unlimited
Visuals Unlimited, Inc. specializes in, microscopy, healthcare, medical, wildlife, underwater, agriculture, and science stock photography.