Semicircular canals

Three membranous semicircular ducts are shown. One is visible at its attachment with the utricle, just beginning to enter its semicircular canal. The second is sectioned at a distance from the utricle, lying in its bony semicircular canal. The third semicircular duct is represented by its ampulla and the enclosed crista ampullaris. 30x

Three membranous semicircular ducts are shown. One is visible at its attachment with the utricle, just beginning to enter its semicircular canal. The second is sectioned at a distance from the utricle, lying in its bony semicircular canal. The third semicircular duct is represented by its ampulla and the enclosed crista ampullaris. 30x

Three membranous semicircular ducts are shown. One is visible at its attachment with the utricle, just beginning to enter its semicircular canal. The second is sectioned at a distance from the utricle, lying in its bony semicircular canal. The third semicircular duct is represented by its ampulla and the enclosed crista ampullaris. 30x

Three membranous semicircular ducts are shown. One is visible at its attachment with the utricle, just beginning to enter its semicircular canal. The second is sectioned at a distance from the utricle, lying in its bony semicircular canal. The third semicircular duct is represented by its ampulla and the enclosed crista ampullaris. 30x

One semicircular duct (black arrow) is still attached to the utricle, just beginning to enter its semicircular canal. A second duct (red arrow) has already exited from the vestibule and lies in its bony semicircular canal.

The third semicircular duct is represented by its ampulla, where its crista ampullaris is shown.

The third semicircular duct is represented by its ampulla, where its crista ampullaris is shown.

The cochlea, the auditory portion of the inner ear, is also present.