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(A) Human embryo PT-11 (8 mm CR; O'Rahilly stage 15). Transverse section. (B) Diagrammatic representation. The anlage of the stapedial artery (S) originating from the hyoid artery (H) begins to enter the stapedial anlage (ST), situated between the first pharyngeal pouch (P), the hyoid artery (H) and the facial nerve (F). Otic vesicle (O). Internal carotid artery (IC).
