The fornix is narrow. The orifices of the Eustachian tubes are small and
slit-like; the end of the tube causes a rounded projection of the mucous
membrane (Torus tubarius). The œsophageal opening is relatively small
and is encircled by a fold of the mucous membrane. The hyo-pharyngeus
muscle is clearly divided into a kerato-pharyngeus and a
chondro-pharyngeus.