The pharyngeal orifice of the eustachian tube in the aged.
D005064:Eustachian Tube / Q000033:anatomy & histology*; D006652:Histological Techniques; D006801:Humans; D010614:Pharynx / Q000033:anatomy & histology*
EUSTACHIAN TUBE/anatomy and histology; PHARYNX/anatomy and histology