Info

1 vestibulocochlear organ. Organum vesti-bulocochleare. Sensory apparatus housed in the temporal bone for the perception of sound, equilibrium and positional changes.

2 INTERNAL EAR. Auris interna. Part of the vesti-bulocochlear organ residing in the petrous temporal bone.

3 MEMBRANOUS LABYRINTH. Labyrinthus mem-branaceus. Complicated system of ducts and dilatations within the bony labyrinth, which contains sensory epithelium and is suspended by connective tissue. A

4 Endolymph. Fluid contained within the membranous labyrinth.

5 Perilymph. Fluid occupying the osseous labyrinth and surrounding the membranous labyrinth.

6 Vestibular labyrinth. Labyrinthus vestibularis. Portion of membranous labyrinth constituting the organ of equilibrium. It includes the semicircular ducts.

7 Endolymphatic duct. Ductus endolymphaticus [[aquaeductus vestibuli]]. Slender duct arising from the utriculosaccular duct and passing through the osseous aqueduct of the vestibule to terminate as the endolymphatic sac. A

8 Endolymphatic sac. Saccus endolymphaticus. Blind sac of endolymphatic duct located between two dural layers at the posterior wall of the petrous temporal. A

9 Utriculosaccular duct. Ductus utriculosaccu-laris. Slender duct between the saccule and utricle. It gives rise to the endolymphatic duct. A

10 Utricle. Utriculus. Sac 2.5-3.5 mm in diameter, serving as the base for the three semicircular ducts. A

11 Semicircular duct. Ductus semicirculares. Three membranous ducts that resemble two-thirds ofa circular arch, each occupying its own osseous semicircular canal oriented perpendicular to the others.

12 Anterior (superior) semicircular duct. Duc-tus semicircularis anterior. It is oriented vertically and somewhat perpendicular to the petrous part ofthe temporal bone. A

13 Posterior semicircular duct. Ductus semi-circularis posterior. It is oriented somewhat vertically in a plane which runs parallel to the longitudinal axis of the petrous part of the temporal bone. A

14 Lateral semicircular duct. Ductus semicircu-laris lateralis. The most lateral, horizontally oriented semicircular duct. It may create a bulge in the medial wall of the tympanic cavity. A

15 Proper membrane of semicircular duct. Membrana propria ductus semicircularis. Layer below the basal membrane consisting primarily of densely packed fibers which extends into the looser network of the perilymphatic space. C

Was this article helpful?

0 0
Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

Get My Free Ebook


Post a comment