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"Diagram showing the ear and related parts in a young cat. P., Pinna; Sq., squamosal: E.A.M., external auditory meatus; T., tympanum; M., malleus; I., incus; St., stapes abutting onforamen ovale; B., bulla of tympanic bone; Se., a septum in the bulla; E.T., eustachian tube leading from the tymmpanic cavity to the back of the mouth; B.O., basi-occipital; C., cochlea; S., sacculus; U., utriculus; D.E., ductus endolymphaticus; N., auditory nerve; S.C., semi-circular canal; PE., periotic bone." -Thomson, 1916

Cat Ear

"Diagram showing the ear and related parts in a young cat. P., Pinna; Sq., squamosal: E.A.M., external…

Diagram of a section of a coil of the cochlea of the ear. Labels: C.C, canal of the cochlea; mR, its upper wall; Sc.V, the part of the bony cavity above the canal of the cochlea; Sc.T, the part below it; O.C, the organ of Corti on the basilar membrane; A.N., branch of auditory nerve in the central column of the spiral; a, connective tissue cushion to which the basilar membrane is attached; b, the bony walls; m.t, a membrane lying over the organ of Corti; l.s, the spiral ledge projecting from the axis.

Cochlea

Diagram of a section of a coil of the cochlea of the ear. Labels: C.C, canal of the cochlea; mR, its…

In this figure are shown the winding passages of the ear (the labyrinth of the ear). The middle part of it (v) is the vestibule. From this go out on the upper side the semi-circular canals (x,y,z) and on the lower side of the passages of the cochlea (k). The opening into the vestibule (o) is covered by the second drum. Another opening (r) is also covered by a membrane or drum. The cochlea (k) is so called because it is shaped like a snail's shell.

The Cochlea and Passages of the Ear

In this figure are shown the winding passages of the ear (the labyrinth of the ear). The middle part…

The cochlea in transverse section. Observe especially the canals of the cochlea, which is a part of the membranous labyrinth.

Cochlea in Transverse Section

The cochlea in transverse section. Observe especially the canals of the cochlea, which is a part of…

The cochlea laid open.

Cochlea Laid Open

The cochlea laid open.

A cross-section of a turn of the cochlea of the ear(diagrammatic).

Cochlea of the Ear

A cross-section of a turn of the cochlea of the ear(diagrammatic).

An imaginary figure or plan of the cochlea.

The Cochlea of the Ear

An imaginary figure or plan of the cochlea.

A vertical section of the cochlea, highly magnified, to show the arrangement and connection of its parts.

The Cochlea of the Ear

A vertical section of the cochlea, highly magnified, to show the arrangement and connection of its parts.

A section through the cochlea in the line of its axis.

The Cochlea of the Ear

A section through the cochlea in the line of its axis.

Longitudinal section of the cochlea, showing the relations of the scalae, the ganglion spirale, ect. Labels: S.V., Scala vestibuli; S.T., Scala tympani; S.M., Scala media; L.S., Ligamentum spirale; G.S., Ganglion spirale.

Longitudinal Section of the Cochlea

Longitudinal section of the cochlea, showing the relations of the scalae, the ganglion spirale, ect.…

Section of one coil of the cochlea, magnified. Labels: SV, scala vestibuli; R, membrane of Reissner; CC, membranous cochlea; lls, limbus laminae spiralis; t, tectorial membrane; ST, scala tympani; lso, spiral lamina; Co, rods of Corti; b, basilar membrane.

Cochlea, Section of

Section of one coil of the cochlea, magnified. Labels: SV, scala vestibuli; R, membrane of Reissner;…

Section of bony cochlea.

Section of Cochlea

Section of bony cochlea.

Section through one of the coils of the cochlea. Labels: ST, scala tympani; SV, scala vestibuli; CC, canalis cochlea or canalis membranaceus; R, membrane of Reissner; lso; lamina spiralis ossea; Us, limbus laminae spiralis; ss, sulcus spiralis; nc, cochlear nerve; gs, ganglion spirale; t, membrana tectoria; b, membrana basilaris; Co, rods of Corti; lsp, ligamentum spirale.

Section Through Coil of the Cochlea

Section through one of the coils of the cochlea. Labels: ST, scala tympani; SV, scala vestibuli; CC,…

The cochlea of the ear which is a spiral canal situated in the eburnated portion of the petrous bone, diametrically opposite to the internal auditory canal.

The Cochlea

The cochlea of the ear which is a spiral canal situated in the eburnated portion of the petrous bone,…

Vertical section through the right cochlea, medial portion, viewed from the lateral side.

Vertical Section Through the Cochlea

Vertical section through the right cochlea, medial portion, viewed from the lateral side.

Transverse section of Corti's organ from the central coil of cochlea.

Section of Corti's Organ

Transverse section of Corti's organ from the central coil of cochlea.

"Diagram of the Middle and Internal Ear." — Blaisedell, 1904

Ear

"Diagram of the Middle and Internal Ear." — Blaisedell, 1904

"Section through right ear. 1, helix; 2, concha; 3, outer passage; 4, 5, 6, semi-circular canals; 7, oval window; 8, cochlea; 9, Eustachian tube; 10, eardrum." -Foster, 1921

Ear

"Section through right ear. 1, helix; 2, concha; 3, outer passage; 4, 5, 6, semi-circular canals; 7,…

Semi-diagrammatic section through the right ear. Labels: M, concha; G, the external auditory canal; T, tympanic, or drum-membrane (ear drum); P, tympanum, or middle ear; o, oval window; r, round window. Extending from T to o is seen the chain of the tympanic bones; R, Eustachian tube; V, B, S, bony labyrinth; V, vestibule; B, semicircular canal; S, cochlea; b, l, v, membranous labyrinth in semi-circular canal and in vestibule. A, auditory nerve dividing into branches for vestibule, semicircular canal, cochlea.

Ear and Auditory Canal

Semi-diagrammatic section through the right ear. Labels: M, concha; G, the external auditory canal;…

A diagram of the human ear. It is divided into the outer ear - A, middle ear - B, and inner ear - C. 1: ear trumpet or pinna, 2: outer ear passage with the drum that vibrates when sound waves hit it or the tympanum (3) across the inner ear, 4-5-6: the ear ossicles: hammer (malleus) anvil (incus) and stirrup (stapes) which transmit vibrations from the drum to the inner ear (they are also the smallest bones in the body), 7: the Eustachian tube, which connects to the mouth and through which air can indirectly enter, 8: largest chamber in the inner ear, called the utriculus, that has three semicircular canals, 9: the smallest chamber, called the sacculus, which is connected to the cochlea (10) which is the important hearing organ, 11: a "window" in the periotic bone, called the fenestra rotunda, 12: the endolymphatic duct.

Human Ear

A diagram of the human ear. It is divided into the outer ear - A, middle ear - B, and inner ear - C.…

"Transverse Section through Side Walls of Skull, showing the Inner Parts of the Ear. Co, concha or external ear, or pinna; EM, external auditory meatus; TyM, tympanic membrane; Inc, incus; Mall, malleus; ASC, PSC, ESC, anterior, posterior, and external semicircular canals; Coc, cochlea; Eu, Eustachian tube; IM, internal auditory meatus, through which the auditory nerve passes to the organ of hearing." -Whitney, 1911

Inner Ear

"Transverse Section through Side Walls of Skull, showing the Inner Parts of the Ear. Co, concha or external…

"<em>A</em>, oval window; <em>B, C, D,</em> semicircular canals; * represents the bulging part of each canal; <em>E, F, G,</em> cochlea; <em>H</em>, round window." &mdash; Blaisedell, 1904

Internal ear

"A, oval window; B, C, D, semicircular canals; * represents the bulging part of each…

Membranous labyrinth of the right ear, viewed from the outer side.

Membranous Labyrinth of the Ear

Membranous labyrinth of the right ear, viewed from the outer side.

Semi-diagrammatic section through the right ear. Labels: M, concha; G, external auditory meatus; T, tympanic or drum membrane; P, middle ear; o, oval foramen; r, round foramen. Extending from T to o is seen the chain of tympanic bones. R, Eustachian tube. V,B,S, bony labyrinth: V, vestibule; B, semicircular canal; S, cochlea. b,l,l', membranous semicircular canal and vestibule. A, auditory nerve dividing into branches for vestibule, semicircular canal, and cochlea.

Section Through the Right Ear

Semi-diagrammatic section through the right ear. Labels: M, concha; G, external auditory meatus; T,…

The osseous labyrinth laid open.

Osseous Labyrinth

The osseous labyrinth laid open.

The osseous labyrinth in vertical section. The broken, white lines indicate the position of the basilar membrane of the canal of the cochlea.

Osseous Labyrinth in Vertical Section

The osseous labyrinth in vertical section. The broken, white lines indicate the position of the basilar…