The dorsal aortae are paired (left and right) embryological vessels which progress to form the
descending aorta
In human anatomy, the descending aorta is part of the aorta, the largest artery in the body. The descending aorta begins at the aortic arch and runs down through the chest and abdomen. The descending aorta anatomically consists of two portions o ...
. The paired dorsal aortae arise from
aortic arches
The aortic arches or pharyngeal arch arteries (previously referred to as branchial arches in human embryos) are a series of six paired embryological vascular structures which give rise to the great arteries of the neck and head. They are ventral ...
that in turn arise from the
aortic sac.
The primary dorsal aorta is located deep to the lateral plate of
mesoderm and move from lateral to medial position with development and eventually will fuse with the other dorsal aorta to form the
descending aorta
In human anatomy, the descending aorta is part of the aorta, the largest artery in the body. The descending aorta begins at the aortic arch and runs down through the chest and abdomen. The descending aorta anatomically consists of two portions o ...
.
Each
primitive aorta anteriorly receives the
vitelline vein from the
yolk-sac
The yolk sac is a membranous sac attached to an embryo, formed by cells of the hypoblast layer of the bilaminar embryonic disc. This is alternatively called the umbilical vesicle by the Terminologia Embryologica (TE), though ''yolk sac'' is far ...
, and is prolonged backward on the lateral aspect of the
notochord under the name of the dorsal aorta.
The dorsal aortae give branches to the yolk-sac, and are continued backward through the body-stalk as the
umbilical arteries
The umbilical artery is a paired artery (with one for each half of the body) that is found in the abdominal and pelvic regions. In the fetus, it extends into the umbilical cord.
Structure Development
The umbilical arteries supply deoxygenated ...
to the
villi of the
chorion
The chorion is the outermost fetal membrane around the embryo in mammals, birds and reptiles (amniotes). It develops from an outer fold on the surface of the yolk sac, which lies outside the zona pellucida (in mammals), known as the vitell ...
.
References
External links
*
*
*
{{Authority control
Embryology of cardiovascular system
Aorta