Aortic arches:

Aortic arches:

Aortic arches:

These are short vessels connecting ventral and dorsal aortae.

On each side they run within branchial i.e pharyngeal arches are based gradually the 4th and 5th week, in 6 pairs in total the first,
second and fifth pairs are developmental in perspective and they soon disappear.

1st aortic arch:

It disappears into a small portion persists, It also forms a piece of the maxillary artery.

2nd aortic arch:

It disappears into small portions of this arch contributing to the hyoid and stapedial arteries

3rd aortic arch:

It commonly carotid and initial segments of internal carotid artery.

4th aortic arch:

It has ultimate fate different on the right and left side on the left.

1. LEFT, both the proximal and distal segments are retained they are incorporated into the descending arch of the aorta.

2. RIGHT, the proximal segment of the right dorsal aorta persists and they are incorporated into the R subclavian artery
whereas the distal segment regresses.

5th aortic arch -
It is transient and soon obliterates.

6th aortic arch - pulmonary arch

1. RIGHT arch: this proximal segment is incorporated into the R pulmonary artery and the distal segment regresses.
2. LEFT arch: this proximal segment is incorporated into the L pulmonary artery and the distal segment persists as the ductus arteriosus.

Related Questions EMBRYOLOGY

Aortic arches:

These are short vessels connecting ventral and dorsal aortae.

On each side they run within branchial i.e pharyngeal arches are based gradually the 4th and 5th week, in 6 pairs in total the first,
second and fifth pairs are developmental in perspective and they soon disappear.

1st aortic arch:

It disappears into a small portion persists, It also forms a piece of the maxillary artery.

2nd aortic arch:

It disappears into small portions of this arch contributing to the hyoid and stapedial arteries

3rd aortic arch:

It commonly carotid and initial segments of internal carotid artery.

4th aortic arch:

It has ultimate fate different on the right and left side on the left.

1. LEFT, both the proximal and distal segments are retained they are incorporated into the descending arch of the aorta.

2. RIGHT, the proximal segment of the right dorsal aorta persists and they are incorporated into the R subclavian artery
whereas the distal segment regresses.

5th aortic arch -
It is transient and soon obliterates.

6th aortic arch - pulmonary arch

1. RIGHT arch: this proximal segment is incorporated into the R pulmonary artery and the distal segment regresses.
2. LEFT arch: this proximal segment is incorporated into the L pulmonary artery and the distal segment persists as the ductus arteriosus.