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Your circulatory system contains three blood vessel types: arteries, veins, and capillaries ... It’s so important because it serves as the initial pathway for blood that’s leaving the heart ...
The first artery and vein of the vertebrate embryo are formed in the trunk, and when the two are joined they comprise the original cardiovascular loop. These simple endothelial tubes are formed by ...
One of the most fundamental distinctions between blood vessels is that between arteries and veins. These two types ... has begun to define the molecular pathways that specify this differentiated ...
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