Results for innominate artery
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Dictionary:

innominate artery


n.

An artery that arises from the arch of the aorta and divides into the right subclavian and right carotid arteries. Also called brachiocephalic artery, brachiocephalic trunk.


 
 
Medical Dictionary: innominate artery

n.

An artery with origin in the arch of the aorta and with branches to the right subclavian and the right common carotid arteries. Also called brachiocephalic trunk.

 
WordNet: innominate artery
Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: a large artery arising from the arch of the aorta and divides into the right subclavian artery and the right common carotid artery; supplies the right side of the neck and head and the right shoulder and arm


 
Wikipedia: brachiocephalic artery
Artery: Brachiocephalic artery
Gray506.svg
Schematic of the proximal aorta, frontal view. The brachiocephalic artery (labeled innominate) is the third branch of the aorta and the first branch from the arch of the aorta. The heart in the lower left is not shown.
Gray560.png
The veins of the thyroid gland.
Latin truncus brachiocephalicus
Gray's subject #142 548
Source aortic arch
Branches right common carotid artery
right subclavian artery
thyreoidea ima
Vein brachiocephalic vein
MeSH Brachiocephalic+Veins
Dorlands/Elsevier t_20/12825973

The brachiocephalic artery (or brachiocephalic trunk or innominate artery) is an artery of the mediastinum that supplies blood to the right arm and the head and neck.

It is the first branch of the aortic arch, and soon after it is emerges, the brachiocephalic artery divides into the right common carotid artery and the right subclavian artery.

There is no brachiocephalic artery for the left side of the body. The left common carotid, and the left subclavian artery, come directly off the aortic arch. However, there are two brachiocephalic veins.

Origin

It arises, on a level with the upper border of the second right costal cartilage, from the commencement of the arch of the aorta, on a plane anterior to the origin of the left carotid; it ascends obliquely upward, backward, and to the right to the level of the upper border of the right sternoclavicular articulation, where it divides into the right common carotid and right subclavian arteries.

Relations

Anteriorly, it is separated from the manubrium sterni by the Sternohyoideus and Sternothyreoideus, the remains of the thymus, the left innominate and right inferior thyroid veins which cross its root, and sometimes the superior cardiac branches of the right vagus. Posterior to it is the trachea, which it crosses obliquely.

On the right side are the right innominate vein, the superior vena cava, the right phrenic nerve, and the pleura; and on the left side, the remains of the thymus, the origin of the left common carotid artery, the inferior thyroid veins, and the trachea.

Branches

The innominate artery usually gives off no branches, but occasionally a small branch, the thyreoidea ima, arises from it. Other times, it gives off a thymic or bronchial branch.

The thyreoidea ima (a. thyreoidea ima) ascends in front of the trachea to the lower part of the thyroid gland, which it supplies.

It varies greatly in size, and appears to compensate for deficiency or absence of one of the other thyroid vessels. It occasionally arises from the aorta, the right common carotid, the subclavian or the internal mammary.

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External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.


 
 

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Copyrights:

Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved.  Read more
Medical Dictionary. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company Read more
WordNet. WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.  Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Brachiocephalic artery" Read more

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