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Intersegmental artery

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The intersegmental arteries are a set of 30 arteries arising from the embryonic dorsal aorta,[1] with each artery providing blood supply to one somite and its derivatives.

Cervical intersegmental arteries

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The cervical intersegmental arteries merge into the vertebral artery[1] with the exception of the 7th (or possibly the 6th) cervical intersegmental artery, which becomes the subclavian artery.[2] The confusion arises because the vertebral artery drains into the subclavian artery following the disappearance of the dorsal aortae in part of the cervical region.

Thoracic intersegmental arteries

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The thoracic intersegmental arteries all develop into the intercostal arteries.[1]

Lumbar intersegmental arteries

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The lumbar intersegmental arteries develop into the lumbar arteries, with the exception of the 5th (last) lumbar intersegmental artery, which becomes the common iliac arteries.[1]

Sacral intersegmental arteries

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These arteries merge into the lateral sacral artery.[1]

References

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  1. ^ a b c d e Moore, Keith L.; Persaud, T. V. N.; Torchia, Mark G. (2015-04-06). The Developing Human: Clinically Oriented Embryology. Elsevier Health Sciences. p. 288. ISBN 9780323313483.
  2. ^ "Aortic arches". www.embryology.ch. Archived from the original on 2018-10-04. Retrieved 2016-08-10.