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Bio circulatory

EA Nabor 21.2

QuestionAnswer
closed circulatory system blood is enclosed at all times within vessels
What are two major blood vessels in a worm? dorsal and ventral blood vessel
aortic arches 5 tubelike pumps that function as a heart
capillaries smallest blood vessels
aorta segmented heart
open circulatory system blood does not always move within vessels
atrium thin walled chamber
ventricle larger, more muscular, thicker-walled chamber
arteries transport blood away from the heart
veins transport blood back to the heart
Created by: 544
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