The membranous labyrinth and fluids of the inner ear | Acland's Video Atlas of Human Anatomy Skip to main content
4.11.8 The membranous labyrinth and fluids of the inner ear


The component parts of the membranous labyrinth are the three semicircular ducts, each with a sense organ for rotational movement; the cochlear duct, with the sense organ for sound vibrations, and in the vestibule, the utricle and saccule, with their two sense organs for linear movement.

The utricle and saccule connect to the small endolymphatic duct, which goes to a structure not shown here, the endolymphatic sac.

The membranous labyrinth is bounded by a continuous membrane, which forms an essential barrier between the fluid outside it, which is perilymph, and the quite different fluid inside it, endolymph.

In a cross-section, for example of this semicircular canal, this is the bony wall of the semicircular canal, that's part of the bony labyrinth, this is the membranous wall of the semicircular duct, that's part of the membranous labyrinth. The fluid inside the membrane is endolymph; the fluid outside it is perilymph. The difference between the two fluids is essential for the function of the sense organs of hearing and balance.

[Read Less]
Enter an Access Code
Please take a moment to tell us about your experience with AclandAnatomy!
(1000 characters left)
Ease of use 1 = Not easy to use; 5 = Very easy to use
Video navigation 1 = Not easy to navigate; 5 = Very easy to navigate
Search results 1 = Not relevant; 5 = Very relevant
Value to your understanding of the subject 1 = Not valuable; 5 = Very valuable
Do you currently use another format of the Acland product (DVDs, streaming/institutional version, etc.)?
Tell us who you are.

May we contact you about your feedback?
reCAPTCHA verification required. Please check the box below and resubmit the form.
Captcha Validation Error. Please try again.
Your feedback has been successfully submitted.
We are unable to receive your feedback at this time. Please try again another time.
Please sign in to submit feedback.