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Dorsal aorta 

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Dorsal aorta

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Dorsal aorta
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Profile view of a human embryo estimated at twenty or twenty-one days old. (Dorsal aorta labeled at center left.)
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Latin aorta dorsalis
Gray's subject #135 506
Carnegie stage 9

Each primitive aorta receives anteriorly a vein—the vitelline vein—from the yolk-sac, and is prolonged backward on the lateral aspect of the notochord under the name of the dorsal aorta.

The dorsal aortæ give branches to the yolk-sac, and are continued backward through the body-stalk as the umbilical arteries to the villi of the chorion.

The two dorsal aortae combine to become the descending aorta in later development.

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