A fetal blood vessel connecting the pulmonary artery with the descending aorta[MESH]. In the developing fetus, the ductus arteriosus is a shunt connecting the pulmonary artery to the aortic arch. It allows most of the blood from the right ventricle to bypass the fetus' fluid-filled lungs, protecting the lungs from being overworked and allowing the left ventricle to strengthen. There are two other fetal shunts, the ductus venosus and the foramen ovale[MP]. the fetal vessel that connects the left pulmonary artery with the descending aorta; the ductus arteriosus normally regresses into a fibrous cord, the ligamentum arteriousum after birth[MP] [ http://en.wikipedia.org/wiki/Ductus_arteriosus MP:0010564 MESH:A07.541.278.395 ]

Synonyms: ductus Botallo

This is just here as a test because I lose it

Term information

database cross reference

efo_slim, pheno_slim

depicted by


external definition

The temporary channel or blood vessel between the aorta and pulmonary artery in the fetus. [TFD][VHOG]

has related synonym

Botallo's duct

fetal ductus arteriosus

ductus arteriosis

arterial duct

ductus botalli

ductus arteriosum

ductus layton

arterial canal

homology notes

On the other hand, in the sister clade of the actinopterygians, the sarcopterygians, the gill circulation is supplemented with lung ventilation. As a result, the pulmonary artery and vein and a functional ductus arteriosus arose as a major evolutionary innovation from the sixth arch, giving the organism a flexible shunt to balance blood supply to and from gills and lungs according to environmental conditions.[well established][VHOG]