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Encyclopedia > Membranous labyrinth
Membranous labyrinth
The membranous labyrinth.
Latin labyrinthus membranaceus
Gray's subject #232 1051
Artery labyrinthine artery
Dorlands/Elsevier l_01/12474331

The membranous labyrinth is lodged within the bony labyrinth, and has the same general form; it is, however, considerably smaller, and is partly separated from the bony walls by a quantity of fluid, the perilymph. Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Section of an artery For other uses, see Artery (disambiguation). ... The labyrinthine artery (auditory artery, internal auditory artery), a long slender branch of the basilar artery, arises from near the middle of the artery; it accompanies the acoustic nerve through the internal acoustic meatus, and is distributed to the internal ear. ... Elseviers logo. ... The bony labyrinth (osseous labyrinth) consists of three parts: vestibule semicircular canals cochlea These are cavities hollowed out of the substance of the bone, and lined by periosteum; they contain a clear fluid, the perilymph, in which the membranous labyrinth is situated. ... Perilymph is a fluid located within the cochlea (part of the ear) in 2 of its 3 muscles; the scala typmani and scala vestibuli. ...

In certain places it is fixed to the walls of the cavity.

The membranous labyrinth contains fluid, the endolymph, and on its walls the ramifications of the acoustic nerve are distributed. Endolymph is the fluid contained in the membranous labyrinth of the inner ear. ... The vestibulocochlear nerve is the eighth of twelve cranial nerves, and also known as the auditory nerve. ...

Within the osseous vestibule the membranous labyrinth does not quite preserve the form of the bony cavity, but consists of two membranous sacs, the utricle, and the saccule. Otolith organ Utricle is also a fruit type, found in beet and dock. ... Categories: Stub ...

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy after Henry Gray, is an anatomy textbook widely regarded as a classic work on human anatomy. ...

  Results from FactBites:
X. The Organs of the Senses and the Common Integument. 1d. 4. The Internal Ear or Labyrinth. Gray, Henry. 1918. ... (4443 words)
It is called the labyrinth, from the complexity of its shape, and consists of two parts: the osseous labyrinth, a series of cavities within the petrous part of the temporal bone, and the membranous labyrinth, a series of communicating membranous sacs and ducts, contained within the bony cavities.
The Semicircular Ducts (ductus semicirculares; membranous semicircular canals), (Figs.
—The arteries of the labyrinth are the internal auditory, from the basilar, and the stylomastoid, from the posterior auricular.
The tympanic membrane or ear drum is formed by the approximation of the ectodermal meatal plug and the endoderm of the tympanic cavity with intervening mesoderm.
The ectodermal (outer) surface of the tympanic membrane is supplied by the auriculotemporal branch of the trigeminal nerve and by the auricular branch of the vagus (Arnold's) nerve.
The primordium of the membranous labyrinth appears in human embryos of three weeks as a plaque-like thickening of the ectoderm on either slide of the head dorsal to the first branchial groove in the region of the hindbrain.
  More results at FactBites »



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