Vitelline arteries
Encyclopedia
The vitelline arteries are the arterial counterpart to the vitelline veins
. Like the veins, they play an important role in the vitelline circulation
of blood to and from the yolk sac
of a fetus. They are a branch of the dorsal aorta
.
They give rise to the celiac artery
, superior mesenteric artery
, and inferior mesenteric artery
.
Vitelline veins
-Path:They run upward at first in front, and subsequently on either side of the intestinal canal.They unite on the ventral aspect of the canal, and beyond this are connected to one another by two anastomotic branches, one on the dorsal, and the other on the ventral aspect of the duodenal portion of...
. Like the veins, they play an important role in the vitelline circulation
Vitelline circulation
Vitelline circulation refers to the system of blood flowing from the embryo to the yolk sac and back again.The yolk-sac is situated on the ventral aspect of the embryo; it is lined by endoderm, outside of which is a layer of mesoderm...
of blood to and from the yolk sac
Yolk sac
The yolk sac is a membranous sac attached to an embryo, providing early nourishment in the form of yolk in bony fishes, sharks, reptiles, birds, and primitive mammals...
of a fetus. They are a branch of the dorsal aorta
Dorsal aorta
Each primitive aorta receives anteriorly a vein—the vitelline vein—from the yolk-sac, and is prolonged backward on the lateral aspect of the notochord under the name of the dorsal aorta....
.
They give rise to the celiac artery
Celiac artery
The celiac artery, also known as the celiac trunk, is the first major branch of the abdominal aorta. Branching from the aorta anterior to the upper border of L1 vertebra in humans, it is one of three anterior/ midline branches of the abdominal aorta The celiac (or coeliac) artery, also known as...
, superior mesenteric artery
Superior mesenteric artery
In human anatomy, the superior mesenteric artery arises from the anterior surface of the abdominal aorta, just inferior to the origin of the celiac trunk, and supplies the intestine from the lower part of the duodenum through two-thirds of the transverse colon, as well as the pancreas.-Location...
, and inferior mesenteric artery
Inferior mesenteric artery
In human anatomy, the inferior mesenteric artery, often abbreviated as IMA, supplies the large intestine from the left colic flexure to the upper part of the rectum, which includes the descending colon, the sigmoid colon, and part of the rectum...
.
External links
- http://isc.temple.edu/marino/embryology/Heart98/heart_text.htm
- http://www.ana.ed.ac.uk/database/humat/notes/extraemb/yolksac/vitart.htm
- http://www.med.umich.edu/lrc/coursepages/M1/embryology/embryo/13cardiovascular_system.htm
- http://www.med.mun.ca/anatomyts/embryo/emb6.htm