Aortic arch

arch of the aortaaortic knobisthmus of aortaarcharch of aortaArcus aortaeIsthmus of the aortatransverse aortic arch
The aortic arch, arch of the aorta, or transverse aortic arch is the part of the aorta between the ascending and descending aorta.wikipedia
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Aorta

aorticaortic archaortic root
The aortic arch, arch of the aorta, or transverse aortic arch is the part of the aorta between the ascending and descending aorta.
In this system, the aorta starts as the ascending aorta, travels superiorly from the heart, and then makes a hairpin turn known as the aortic arch.

Descending aorta

descending thoracic aortadorsal aortaproximal descending aorta
The aortic arch, arch of the aorta, or transverse aortic arch is the part of the aorta between the ascending and descending aorta.
The descending aorta begins at the aortic arch and runs down through the chest and abdomen.

Ascending aorta

aortic rootaorticaortic bulb
The aortic arch, arch of the aorta, or transverse aortic arch is the part of the aorta between the ascending and descending aorta.
At the union of the ascending aorta with the aortic arch the caliber of the vessel is increased, owing to a bulging of its right wall.

Baroreceptor

baroreceptorsArterial baroreceptorsbaroceptor
Innervated by barometric nerve terminals, the aortic arch is responsible for sensing changes in the dilation of the vascular walls, inducing changes in heart rate to compensate for changes in blood pressure.
Baroreceptors (or archaically, pressoreceptors) are sensors located in the carotid sinus (at the bifurcation of external and internal carotids) and in the aortic arch.

Subclavian artery

subclavian arteriessubclavianleft subclavian artery
Finally, the left subclavian artery comes off of the aortic arch to the left of the left common carotid artery and ascends, with the left common carotid, through the superior mediastinum and along the left side of the trachea.
They receive blood from the aortic arch.

Trachea

windpipetrachealtracheae
The arch travels backward, so that it ultimately runs to the left of the trachea. Aortopexy is a surgical procedure in which the aortic arch is fixed to the sternum in order to keep the trachea open. The aorta begins at the level of the upper border of the second sternocostal articulation of the right side, and runs at first upward, backward, and to the left in front of the trachea; then travels backward on the left side of the trachea and finally passes downward on the left side of the body of the fourth thoracic vertebra.
In front of the lower trachea lies the manubrium of the sternum, the remnants of the thymus in adults; to the front left the large blood vessels the aortic arch and its branches the left common carotid artery and the brachiocephalic trunk; and the left brachiocephalic vein.

Mediastinum

mediastinalposterior mediastinumanterior mediastinum
The arch of the Aorta lies within the mediastinum.

Ductus arteriosus

ductus arteriosisductal
The ductus arteriosus connects to the lower part of the arch in foetal life. The ductus arteriosus connects to the final section of the arch in foetal life and the ligamentum arteriosum when the ductus arteriosus regresses.
The ductus arteriosus is formed from the left 6th aortic arch during embryonic development and attaches to the final part of the aortic arch (the isthmus of aorta) and the first part of the pulmonary artery

Common carotid artery

carotidcarotid arteriescarotid artery
Next, the left common carotid artery originates from the aortic arch to the left of the brachiocephalic trunk, then ascends along the left side of the trachea and through the superior mediastinum.
The right common carotid originates in the neck from the brachiocephalic trunk; the left from the aortic arch in the thorax.

Aortic arches

aortic archbranchial3.
The aortic arch is the connection between the ascending and descending aorta, and its central part is formed by the left 4th aortic arch during early development.
The fourth left arch forms the arch of the aorta between the origin of the left carotid artery and the terminus of the ductus arteriosus.the fourth arches called systemic arch

Aortopexy

Aortopexy is a surgical procedure in which the aortic arch is fixed to the sternum in order to keep the trachea open.
Aortopexy is a surgical procedure in which the aortic arch is fixated to the sternum.

Ligamentum arteriosum

The ductus arteriosus connects to the final section of the arch in foetal life and the ligamentum arteriosum when the ductus arteriosus regresses.
At the superior end, the ligamentum attaches to the aorta—at the final part of the aortic arch (the isthmus of aorta) or the first part of the descending aorta.

Descending thoracic aorta

thoracic aortathoracicthoracic part
The descending thoracic aorta begins at the lower border of the fourth thoracic vertebra where it is continuous with the aortic arch, and ends in front of the lower border of the twelfth thoracic vertebra, at the aortic hiatus in the diaphragm where it becomes the abdominal aorta.

Brachiocephalic artery

brachiocephalic trunkinnominate arterybrachiocephalic
The first, and largest, branch of the arch of the aorta is the brachiocephalic trunk, which is to the right and slightly anterior to the other two branches and originates behind the manubrium of the sternum.
It is the first branch of the aortic arch, and soon after it emerges, the brachiocephalic artery divides into the right common carotid artery and the right subclavian artery.

Lung

lungspulmonaryright lung
On the same surface, immediately above the hilum, is a well-marked curved groove for the aortic arch, and a groove below it for the descending aorta.

Tunica intima

intimaintimalinner layer
At the cellular level, the aorta and the aortic arch are composed of three layers: The tunica intima, which surrounds the lumen and is composed of simple squamal epithelial cells; the tunica media, composed of smooth cell muscles and elastic fibers; and, the tunica adventitia, composed of loose collagen fibers.

Tunica media

mediamedia wallmedial
At the cellular level, the aorta and the aortic arch are composed of three layers: The tunica intima, which surrounds the lumen and is composed of simple squamal epithelial cells; the tunica media, composed of smooth cell muscles and elastic fibers; and, the tunica adventitia, composed of loose collagen fibers.

Tunica externa

tunica adventitiaadventitiaouter adventitial layer
At the cellular level, the aorta and the aortic arch are composed of three layers: The tunica intima, which surrounds the lumen and is composed of simple squamal epithelial cells; the tunica media, composed of smooth cell muscles and elastic fibers; and, the tunica adventitia, composed of loose collagen fibers.

Sternocostal joints

sternocostalCostosternal jointsternocostal articulation
The aorta begins at the level of the upper border of the second sternocostal articulation of the right side, and runs at first upward, backward, and to the left in front of the trachea; then travels backward on the left side of the trachea and finally passes downward on the left side of the body of the fourth thoracic vertebra.

Thoracic vertebrae

dorsal vertebraethoracic vertebrathoracic
The aorta begins at the level of the upper border of the second sternocostal articulation of the right side, and runs at first upward, backward, and to the left in front of the trachea; then travels backward on the left side of the trachea and finally passes downward on the left side of the body of the fourth thoracic vertebra.

Vertebral artery

vertebral arteriesvertebralvertebro
An anatomical variation is that the left vertebral artery can arise from the aortic arch instead of the left subclavian artery.

Ventricle (heart)

ventricleleft ventricleright ventricle
As the left ventricle of the heart increases in size throughout life, the narrowing eventually dilates to become a normal size.

Coarctation of the aorta

aortic coarctationCoarctation of aortacoarctation
If this does not occur, this can result in coarctation of the aorta.

Chest radiograph

chest X-raychest X-rayschest radiography
The aortic knob is the prominent shadow of the aortic arch on a frontal chest radiograph.

Sternum

manubriumbreastbonesternal
Aortopexy is a surgical procedure in which the aortic arch is fixed to the sternum in order to keep the trachea open. below the superior border to the manubrium sterni.