Aortic sac

The aortic sac or aortic bulb is a dilated structure in mammalian embryos, lined by endothelial cells located just above (distal to) the truncus arteriosus. It is the primordial vascular channel from which the aortic arches arise (and eventually the dorsal aortae) and is homologous to the ventral aorta of gill-bearing vertebrates.

单词	Aortic bulb
释义	Aortic bulb 英语百科 Aortic sac The aortic sac or aortic bulb is a dilated structure in mammalian embryos, lined by endothelial cells located just above (distal to) the truncus arteriosus. It is the primordial vascular channel from which the aortic arches arise (and eventually the dorsal aortae) and is homologous to the ventral aorta of gill-bearing vertebrates.
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Aortic bulb

Aortic sac