COMPARISON ARTERIES: VEINS: Carry blood away from the heart

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Presentation transcript:

COMPARISON ARTERIES: VEINS: Carry blood away from the heart Carry blood towards the heart Blood is under great pressure in arteries, hence it flows fast, in spurts, reflecting the rhythmic pumping action of the heart Blood is not under great pressure in veins, hence it flows more slowly and smoothly Have thick and elastic muscular walls Have relatively thin, slightly muscular walls Have no valves Have semi-lunar valves along their lengths to prevent backflow of blood Carry red oxygenated blood (exception: pulmonary arteries which carry deoxygenated blood from the heart to the lungs) Carry bluish-red deoxygenated blood (exception: pulmonary veins which carry oxygenated blood from the lungs to the heart Carry red oxygenated blood (exception: pulmonary arteries which carry deoxygenated blood from the heart to the lungs)