Aorta dorsalis
The dorsal aorta (lat. For, back side main artery ') is an in fetuses of vertebrates usually applied paired blood vessel below the neural tube . In the human fetus, both dorsal locations in the back of the body merge at the end of the fourth week of pregnancy and form the definitive descending aorta . The aorta dorsalis is connected to the aorta ventralis in the area of the branchial intestine via the six branchial arch arteries . The left and right dorsal aorta recede between the third and fourth branchial arches. The remaining part of the left dorsal aorta, together with the fourth branchial arch artery, forms the aortic arch . The right dorsal aorta forms only part of the dextra subclavian artery . Together with the third branchial arch artery, the two dorsal sites upstream of the regression form the respective internal carotid artery .
Three groups of blood vessels arise from the dorsal arteries:
- The dorsal intersegmental arteries arise on the back and supply the abdominal wall.
- The lateral splanchnic arteries are the lateral intestinal arteries ( urnal arteries ).
- The ventral splanchnic arteries are the abdominal intestinal arteries . They form the yolk sac arteries ( aa. Vitellinae), the celiac trunk , the superior and inferior mesenteric arteries , the allantoic artery ( allantoic artery ) and the umbilical artery ( umbilical artery ).
literature
- Herbert Lippert: Anatomy compact . Springer-Verlag, 2013, ISBN 9783642957260 , p. 108.