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 [ MP:0012510 ]

Synonyms: saccus aorticus

This is just here as a test because I lose it

Term information



latin term
saccus aorticus

external definition

the merged ventral aortae of the embryo which supplies blood to the aortic arches[TMD][].