This human anatomy ClipArt gallery offers 361 illustrations of human sensory systems, which includes views of structures composing the five sensory systems in humans: vision (sight), auditory (hearing), olfactory (smell), gustatory (taste), and somatosensory (touch).

Lines for the detection of astigmatism. "The refracting surfaces of the eye acting together are equivalent in refracting power to a single, spherical surface of fairly short curvature. Frequently, however, the result is not the same as would be given by a perfect spherical surface, owing to inequalities in the curvature of the eye. In one direction the curvature may be greater than that at right angles to it. This tendency to a cylindrical form is called astigmatism. It interferes with the formation of perfect images and sometimes leads to serious eye strain in the effort to better the vision. Astigmatism may be detected by looking at black lines radiating from a point or at fine black concentric circles. Portions of the liens or circles appear gray and others black; the gray portions are out of focus. This defect is corrected by proper cylindrical glasses which equalize the curvature of the eye" — Newell, 1900

Detection of Astigmatism

Lines for the detection of astigmatism. "The refracting surfaces of the eye acting together are equivalent…

An illustration depicting an astigmatism. An optical system with astigmatism is one where rays that propagate in two perpendicular planes have different foci. If an optical system with astigmatism is used to form an image of a cross, the vertical and horizontal lines will be in sharp focus at two different distances.

Diagram Illustrating Astigmatism

An illustration depicting an astigmatism. An optical system with astigmatism is one where rays that…

The auditory apparatus with the surrounding bone removed. Labels: M, external auditory canal; SC, semicircular canals; C, cochlea.

The Auditory Apparatus

The auditory apparatus with the surrounding bone removed. Labels: M, external auditory canal; SC, semicircular…

A diagram of a section of the auditory apparatus. Labels: E, external canal; M, in the middle ear; V, vestibule; SC, semi-circular canals; N, auditory nerve; S, cochlea; ET, Eustachian tube.

Diagram of the Auditory Apparatus

A diagram of a section of the auditory apparatus. Labels: E, external canal; M, in the middle ear; V,…

Transverse section of external auditory canal and tympanum. Left side.

Auditory Canal and Tympanum

Transverse section of external auditory canal and tympanum. Left side.

"By anatomists, the auditory nerve is associated with the facial, and is the seventh in order of origin from the brain, counting from before backwards. The seventh pair consists of the portio dura or facial, the portio mollis or auditory, and a small intermediate portion." — Chambers' Encyclopedia, 1875

Auditory Nerve

"By anatomists, the auditory nerve is associated with the facial, and is the seventh in order of origin…

"By anatomists, the auditory nerve is associated with the facial, and is the seventh in order of origin from the brain, counting from before backwards. The seventh pair consists of the portio dura or facial, the portio mollis or auditory, and a small intermediate portion." — Chambers' Encyclopedia, 1875

Auditory Nerve

"By anatomists, the auditory nerve is associated with the facial, and is the seventh in order of origin…

"a, the osseous septum grooved for the passage of the cochlear nerve b, which terminates by a free end inside the chamber c, along the floor of which it lies for a short distance; d, d are the two layers of the membranous septum. Lying in contact with the end of the nerve is the enlarged extremity of a rod e, which is connected in a flail-like manner by the hinge f to another rod, which is fixed at g." — Chambers' Encyclopedia, 1875

Auditory Nerve

"a, the osseous septum grooved for the passage of the cochlear nerve b, which terminates by a free end…

A view of the auditory nerve. Labels: 1, The spinal cord. 2, The medulla oblongata. 3, The lower part of the brain. 4, The auditory nerve. 5, A branch to the semicircular canals. 6, A branch to the cochlea.

View of the Auditory Nerve

A view of the auditory nerve. Labels: 1, The spinal cord. 2, The medulla oblongata. 3, The lower part…

Central connections of the cochlear and vestibular divisions of the auditory nerve.

Auditory Nerves

Central connections of the cochlear and vestibular divisions of the auditory nerve.

The auditory ossicles of the right ear, seen from the front. Labels: M, malleus; J, incus; S, stapes; Mcp, head of the malleus; Mc, neck of the malleus; Ml, long process; Mm, handle; Jc, boy; Jb, short, and Jl, long process of incus; Jpl, os orbiculare; Scp, head of stapes.

The Auditory Ossicles

The auditory ossicles of the right ear, seen from the front. Labels: M, malleus; J, incus; S, stapes;…

Casts of the bony labyrinth of the ear. Labels: A, left labyrinth see from the outer side; B, right labyrinth from the inner side; C, left labyrinth from above; Fc, round foramen; Fv, oval foramen; h, horizontal semicircular canal; ha, its ampulla; Vaa, ampulla of anterior vertical semicircular canal; Vpa, ampulla of posterior vertical semicircular canal; Vc, conjoined portion of the two vertical canals.

The Bony Labyrinth of the Ear

Casts of the bony labyrinth of the ear. Labels: A, left labyrinth see from the outer side; B, right…

"A Cast of the External Auditory Canal. The auditory canal is a passage in the solid potion of the temporal bone. It is lined by skin on which there are fine hairs, and a set of glands secreting earwax, which serves to moisten the parts, catch particles fo dust, and keep away small insects." — Blaisedell, 1904

External auditory canal

"A Cast of the External Auditory Canal. The auditory canal is a passage in the solid potion of the temporal…

The capsule of Ténon consists of a thin membrane which envelops the eyeball from the optic nerve to the ciliary region, separating it from the orbital fat and forming a socket in which it plays. Shown is the capsule of Ténon. The aponeurosis is seen from behind forward on the posterior hemisphere of the globe. Labels: a, Cellulofibrous intermuscular lamina; b, deep leaf of the sheath incised at the point where it leaves the muscle to fold itself on the posterior hemisphere when it forms the posterior capsule; d, Partly incised; c, Serous membrane.

Capsule of Ténon

The capsule of Ténon consists of a thin membrane which envelops the eyeball from the optic nerve…

Section of cerebral cortex.

Section of Cerebral Cortex

Section of cerebral cortex.

Vertical section of the chorioid and inner part of the sclera.

Vertical Section of the Chorioid and Sclera

Vertical section of the chorioid and inner part of the sclera.

Section through the choroid coat of the human eye. Labels: 1, elastic membrane, structureless or finely fibrillated; 2, chorio-capillaris or tunica Ruyschiana; 3, Proper substance of the choroid with large vessels cut through; 4, suprachoroidea; 5, sclerotic.

Section Through the Choroid Coat

Section through the choroid coat of the human eye. Labels: 1, elastic membrane, structureless or finely…

The choroid, ciliary body, and iris of the eyeball.

The Choroid, Ciliary Body, and Iris

The choroid, ciliary body, and iris of the eyeball.

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.

Part of cochlear nerve.

Cochlear Nerve

Part of cochlear nerve.

A. A cone and two rods from the human retina (modified from Max Schultze); B. Outer part of rod separated into discs.

Cones and Rods of Retina

A. A cone and two rods from the human retina (modified from Max Schultze); B. Outer part of rod separated…

The convergence of light rays in the eyeball begins in the aqueous humor is perfected in the crystalline. But when they strike the vitreous humor, which is concave on its front surface, and also less dense than the crystalline, they diverse or spread out, and are thrown upon the back part of the eye.

Convergence of Rays in the Aqueous Humor of the Eyeball

The convergence of light rays in the eyeball begins in the aqueous humor is perfected in the crystalline.…

Section of human cornea.

Section of Cornea

Section of human cornea.

The cornea, which is the anterior transparent portion of the eyeball.

The Cornea

The cornea, which is the anterior transparent portion of the eyeball.

Vertical section of the cornea.

Vertical Section of the Cornea

Vertical section of the cornea.

A portion of the corona ciliaris magnified. The ciliary processes and the ciliary folds.

Magnified Corona Ciliaris

A portion of the corona ciliaris magnified. The ciliary processes and the ciliary folds.

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.

Section through outer wall of ductus cochlearis.

Section Through Ductus Cochlearis Wall

Section through outer wall of ductus cochlearis.

Section across the ductus cochlearis.

Section Across Ductus Cochlearis

Section across the ductus cochlearis.

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

Ear

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

The organ of hearing.

Ear

The organ of hearing.

A sketch of the human ear.

Ear

A sketch of the human ear.

Interior of the ear. There is external to the head a wide-mouthed tube, or ear-trumpet (a), for catching and concentrating the waves of sound. It is movable in many beings, so that they can direct it to the place from which the sound comes. The sound concentrated at the bottom of the ear-tube falls upon a membrane stretched across the channel, like the parchment of an ordinary drum, over the space called the <em>tympanum</em>, or <em>drum of the ear</em> (b), and causes the membrane to vibrate. That its motion may be free, the air contained within the drum has free communication with the external air by the open passage (f), called the <em>eustachian tube</em>, leading to the back of the mouth. A degree of deafness ensues when this tube is obstructed, as in a cold; and a crack, or sudden noise, with immediate return of natural hearing, is, generally experienced when, in the effort of sneezing or otherwise, the obstruction is removed. The vibrations of the membrane of the drum are conveyed further inwards, through the cavity of the drum, by a chain of four bones (not here represented on account of their minuteness), reaching from the centre of the membrane to the <em>oval door</em> or <em>window</em>, leading into the labyrinth (e). The labyrinth, or complex inner compartment of the ear, over which the nerve of hearing is spread as a lining, is full of watery fluid; and, therefore, by the law of fluid pressure, when the force of the moving membrane of the drum, acting through the chain of bones, is made to compress the water, the pressure is felt instantly over the whole cavity. The labyrinth consists of the <em>vestibule</em> (e), the three <em>semicircular canals</em> (c), imbedded in the hard bone, and a winding cavity, called the <em>cochlea</em> (d), like that of a snail-shell, in which fibres, stretched across like harp-strings, constitute the <em>lyra</em>.

Ear

Interior of the ear. There is external to the head a wide-mouthed tube, or ear-trumpet (a), for catching…

An ear

Ear

An ear

The human ear. Labels: A, vestibule or antechamber; B, auditory canal; C, the hammer, anvil, and the stirrup; D, semicircular canals; E, cochlea; G, Eustachian tube.

Ear

The human ear. Labels: A, vestibule or antechamber; B, auditory canal; C, the hammer, anvil, and the…

"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,…

Diagrammatic view of the organ of hearing.

Ear

Diagrammatic view of the organ of hearing.

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;…

External ear and muscles.

External Ear and Muscles

External ear and muscles.

The right ear cartilage, isolated, viewed from without.

Ear Cartilage

The right ear cartilage, isolated, viewed from without.

Vertical section through the external auditory canal and tympanum, passing in front of the fenestra ovalis.

Ear Showing Auditory Canal and Tympanum

Vertical section through the external auditory canal and tympanum, passing in front of the fenestra…

Vertical section through the external auditory meatus and tympanum, passing in front of the fenestra ovalis.

Ear Showing External Auditory Meatus

Vertical section through the external auditory meatus and tympanum, passing in front of the fenestra…

Horizontal section through the right external acoustic canal viewed from above.

Auditory Apparatus of the Ear

Horizontal section through the right external acoustic canal viewed from above.

Vertical section through the right external acoustic canal, viewed from in front.

Auditory Canal of the Ear

Vertical section through the right external acoustic canal, viewed from in front.

Bones of the ear, including the hammer (m), the anvil (i), and the stirrup (s).

Bones of the Ear

Bones of the ear, including the hammer (m), the anvil (i), and the stirrup (s).

Bones of the ear together with the ear drum.

Bones of the Ear

Bones of the ear together with the ear drum.

Bones of the ear: Malleus, Incus and Orbiculare, Stapes. The bones of the area are connected with each other in the drum and serve to transmit vibrations of the membrane of the tympanum to the internal ear. They are very hard and brittle, with no cartilage on their articular surfaces like other bones.

Bones of the Ear

Bones of the ear: Malleus, Incus and Orbiculare, Stapes. The bones of the area are connected with each…