part_of part of part of develops from branching part of Homo sapiens external carotid artery http://upload.wikimedia.org/wikipedia/commons/1/13/External_carotid_a.gif https://sourceforge.net/tracker/?func=detail&aid=3486863&group_id=76834&atid=1127722 not homologous to the external carotid of zebrafish (Goodrich, 1958) - http://zfish.nichd.nih.gov/zfatlas/Intro%20Page/comparative.html; check XAO common carotid artery plus branches carotid artery segment