Uberon definition : The dilated structure that is lined by endothelial cells and located at the arterial
pole of the heart just above (distal to) the truncus arteriosus in mammalian embryos;
it is the primordial vascular channel from which the aortic arches (and eventually
the dorsal aortae) arise; the aortic sac is homologous to the ventral aorta of gill-bearing
vertebrates;
The dilated structure that is lined by endothelial cells and located at the arterial
pole of the heart just above (distal to) the truncus arteriosus in mammalian embryos;
it is the primordial vascular channel from which the aortic arches (and eventually
the dorsal aortae) arise; the aortic sac is homologous to the ventral aorta of gill-bearing
vertebrates