University of Minnesota
University of Minnesota
http://www.umn.edu/
612-625-5000
Home
Make a Gift
What's New
 
HeartDatabase
 
Right Atrium
Right Ventricle
Pulmonary Trunk
Left Atrium
Left Ventricle
Aorta
Coronary Arteries
Cardiac Veins
External Images
MRI Images
Comparative Imaging
3D Modeling
Plastinates
 
Anatomy Tutorial
Cardiovascular Magnetic Resonance Tutorial
Comparative Anatomy Tutorial
Conduction System Tutorial
Congenital Defects Tutorial
Coronary System Tutorial
Device Tutorial
Echocardiography Tutorial
Physiology Tutorial
 
Project Methodologies
Cardiovascular Devices and Techniques at U of Minnesota
Acknowledgements
References and Links
Atlas in the media
 
Surgery Department
Principal
 
 
 
Congenital Defects Tutorial
Introduction Normal Cardiac Development Part 1 Normal Cardiac Development Part 2 Septal Defects Right Heart Lesions Left Heart Lesions Anomalies of Arteries and Veins Cardiac Transplantation References
Differentiation and Septation Development of the Arteries and the Aortic Arch Coronary Vasculature Conduction System Fetal and Postnatal Circulation Cardiac Maturation Normal Anatomy and its Relationships at Birth

Development of the Arteries and the Aortic Arch

Primitive system

The pharyngeal arches grow out of the mesenchyme in the region of the head and neck, each which contains a cranial nerve and artery. Between day 26 and 29, vasculogenesis and angiogenesis result in the formation of six pairs of aortic arches from the aortic sac. These arteries serve to connect the developing heart with the dorsal aorta. Endothelial precursor cells from the surrounding mesoderm and neural crest cells are crucial for proper development of the aortic arches.

Aortic arches

The aortic arches are a series of six arches that develop consecutively to connect the aortic sac with the paired dorsal aorta. Cardiac neural crest cells migrate through aortic arches 3, 4, and 6 during weeks 3-4 of human development. This process is crucial for normal cardiac development, including the arches themselves.

The first pair forms between day 22 and 24; both arches regress as the second arch forms on day 26 (later atrophying as well). The first three arches aim to supply the cranial and cervical regions and form the internal carotid artery among others. The external carotid artery arises later as an independent vessel. The fourth aortic arch develops unsymmetrically. The left fourth arch forms the proximal part of the adult aortic arch, whereas the right one evolves into the right subclavian artery. The last two arches, 5 and 6, do not appear in large arch shape. The ductus arteriosus is formed by a left dorsal branch from the dorsal aorta, and connects the aortic sac with the pulmonary arteries as a shunt. The left subclavian artery originates from the left seventh intersegmental artery. The aortic valve originates from conotuncal ridge tissue and forms three triangular valve leaflets.

Synopsis origin of major blood vessels

Arch Vessel
1st Maxillary artery, stapedial artery, middle meningeal artery
2nd
3rd Internal carotid artery (branch off common carotid arteries)
4th

Aortic sac
R: Right subclavian artery
L: Aortic arch
Brachiocephalic artery (divides into right subclavian and right common carotid artery)
5th R: Right pulmonary artery (proximal part)
L: Ductus arteriosus
6th Intersegmental artery Left pulmonary artery

 

 
 
© 2019 Regents of the University of Minnesota. All rights reserved. The University of Minnesota is an equal opportunity educator and employer. Privacy Statement