The hypotympanum.
D000328:Adult; D002343:Carotid Artery, Internal / Q000033:anatomy & histology; D004424:Ear Canal / Q000033:anatomy & histology; D007758:Ear, Inner / Q000033:anatomy & histology; D004432:Ear, Middle / Q000033:anatomy & histology*; D006801:Humans; D007231:Infant, Newborn; D007601:Jugular Veins / Q000033:anatomy & histology; D013701:Temporal Bone / Q000033:anatomy & histology