Chapter 25: Special Senses: Hearing & Equilibrium Flashcards

Skin covered cartilaginous structure surrounding the auditory canal.

Ear lobe

Short narrow chamber carved into the temporal bone

Eardrum

The three tiny bones serving as transmitters of vibrations and located within the middle ear: the malleus, incus, and stapes.

Outter bone of the ossicles in middle ear.

Middle bone of the ossicles in middle ear.

Inner bone of the ossicles in middle ear.

A membrane-covered opening which leads from the middle ear to the vestibule of the inner ear.

Tube that connects the middle ear and the pharynx. Also called auditory tube, eustachian tube

rigid outer wall of the inner ear. It consists of three parts: the vestibule, semicircular canals, and cochlea.

Extracellular fluid located within the cochlea (part of the ear) in two of its three compartments: the scala tympani and scala vestibuli.

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.

Fluid contained in the membranous labyrinth of the inner ear.

An enlarged area at the beginning of a canal of the inner ear.
Helps with equilibrium and balance

Three fluid-filled bony channels in the inner ear. They are situated at right angles to each other and provide information about orientation to the brain to help maintain balance.

Snail-shaped chamber of the bony labyrinth that houses the receptor for hearing [the spiral organ (of Corti)].

Endolymph filled cavity inside the cochlea, located in between the scala tympani and the scala vestibuli, separated by the basilar membrane.

The upper bony passage of the cochlea.

The lower bony passage of the cochlea

The organ of Corti (or spiral organ) is the organ in the inner ear of mammals that contains auditory sensory cells, or "hair cells."

The sensory receptors of both the auditory system and the vestibular system in all vertebrates

A nerve in the head that carries signals from the cochlea of the inner ear to the brain.

A membrane in the cochlea that bears the organ of Corti.

A gelatinous membrane positioned over the hair cells of the spiral organ in the cochlea.

A membrane inside the cochlea of the inner ear. It separates scala media from scala vestibuli.

External Ear

Auricle (Pinna)

Lobule

External Acoustic Meatus

Middle Ear

Stapes

Incus

Malleus

Tympanic Membrane

Pharyngotympanic (auditory) Tube

Auditory Nerve

Facial Nerve

Vestibular Nerve

Inner Ear

Cochlea

Semicircular Canals