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The Cellular Biology ClipArt gallery offers 242 illustrations of biology at the cellular level for many species and parts of the body, including blood cells and bone tissue, and also contains general images of cell, cell structure, and cell reproduction.

Ciliated epithelium from the human trachea, highly magnified. Labels: a, large ciliated cell; d, cell, with two nuclei. "In ciliated epithelium the cells, which are generally columnar in shape, bear at their free extremities little hair-like processes which are agitated incessantly with a lashing or vibrating motion. These minute and delicate processes are named cilia, and may be regarded as active prolongations of the cell-protoplasm." —Kimber, 1907

Ciliated Epithelium Cells

Ciliated epithelium from the human trachea, highly magnified. Labels: a, large ciliated cell; d, cell,…

Section of the transitional epithelium lining the bladder, highly magnified. Labels: a, superficial; b, intermediate; c, deep layer of cells.

Epithelium Cells Lining the Bladder

Section of the transitional epithelium lining the bladder, highly magnified. Labels: a, superficial;…

Flat epithelium cells from the surface of the peritoneum. Labels: a, cell body; c, nucleus.

Flat Epithelium Cells

Flat epithelium cells from the surface of the peritoneum. Labels: a, cell body; c, nucleus.

Epithelium of the bladder. Labels: a, one of the cells of the first row; b, a cell of the second row; c, cells in situ, of first, second, and deepest layer.

Epithelium of the Bladder

Epithelium of the bladder. Labels: a, one of the cells of the first row; b, a cell of the second row;…

The vertical section of the stratified epithelium of the cornea of a rabbit. Labels: a, Anterior epithelium showing the different shapes of the cells at various depths from the free surface; b, a portion of the substance of cornea.

Epithelium of the Rabbit's Cornea

The vertical section of the stratified epithelium of the cornea of a rabbit. Labels: a, Anterior epithelium…

Ciliary epithelium of the human trachea. Labels: a, layer of longitudinally arranged elastic fibers; b, basement membrane; c, deepest cells, circular in form; d, intermediate elongated cells; e, outermost layer of cells fully developed and bearing cilia.

Ciliary Epithelium

Ciliary epithelium of the human trachea. Labels: a, layer of longitudinally arranged elastic fibers;…

The jagged cells from the middle layers of pavement epithelium, from a vertical section of the gum of a newborn infant.

Pavement Epithelium

The jagged cells from the middle layers of pavement epithelium, from a vertical section of the gum of…

An illustration of the reproduction of an individual Euplotes Harpa by simple division.

Reproduction of an Individual Euplotes Harpa

An illustration of the reproduction of an individual Euplotes Harpa by simple division.

An illustration of the reproduction of an individual Euplotes Harpa by simple division.

Reproduction of an Individual Euplotes Harpa

An illustration of the reproduction of an individual Euplotes Harpa by simple division.

A few cat cells from the margin of a fat lobule in adipose tissue, very highly magnified. Labels: f.g. fat globules distending a fat cell; n, nucleus; m, membranous envelope of the fat cell; c, capillary vessel; v, veinlet; c.t. connective tissue cell; the fibers of the connective tissue are not shown.

Fat Cells

A few cat cells from the margin of a fat lobule in adipose tissue, very highly magnified. Labels: f.g.…

Fall cells. Labels: a, filled with oil; b, exhausted of oil, the cell wall shriveled.

Fat Cells

Fall cells. Labels: a, filled with oil; b, exhausted of oil, the cell wall shriveled.

The ordinary fat cells of a fact tract in the omentum of a rat.

Fat Cells of a Rat

The ordinary fat cells of a fact tract in the omentum of a rat.

A group of fat cells (F, C) with capillary vessels (C).

Fat Cells with Capillary Vessels

A group of fat cells (F, C) with capillary vessels (C).

There are two fiber types, slow-twitch muscle, or fast-twitch muscle. Most animals have some combination of these two fiber types.

Mustle Fiber

There are two fiber types, slow-twitch muscle, or fast-twitch muscle. Most animals have some combination…

Fibrous tissue, from the longitudinal section of a tendon. "The fibrous tissue is met with in the form of ligaments, connecting the bones together at the joints, and in the form of sinews or tendons, by means of which the muscles are attached to the bones. It also forms fibrous membranes which invest and protect different parts or organs of the body." —Kimber, 1907

Fibrous Tissue of a Tendon

Fibrous tissue, from the longitudinal section of a tendon. "The fibrous tissue is met with in the form…

Fibrous tissue of cornea, showing bundles of fibers with a few scattered fusiform cells (A) lying in the interfascicular spaces.

Fibrous tissue of Cornea

Fibrous tissue of cornea, showing bundles of fibers with a few scattered fusiform cells (A) lying in…

Infusoria is an obsolete collective term for minute aquatic creatures like ciliates, euglenoids, protozoa, and unicellular algae that exist in freshwater ponds. The first type exists in the common fresh-water organism known as Euglena. The spindle-shaped body is surrounded by a delicate cuticle perforated at one point, where a funnel-shaped depression, the gullet, leads into the soft protoplasmic interior. From the base of this depression the protoplasm is drawn out in the form of a delicate ship-like process known as the flagellum. Shown here is Flagellate Infusoria (fig 8A); (c) pulsating vacuole; (e) eye-spot; (g) gullet; (n) nucleus; (t) flagellum.

Flagellate Infusoria

Infusoria is an obsolete collective term for minute aquatic creatures like ciliates, euglenoids, protozoa,…

"Diagram of flame cell, the internal terminus of the excretory tubules. c, cilia lining tubule; f, special cilia constituting the flame; n, nucleus of flame cell; p, cell processes; v, vacuole or cavity in cell communicating with the capillary tubules (t)." -Galloway, 1915

Flame Cell

"Diagram of flame cell, the internal terminus of the excretory tubules. c, cilia lining tubule; f, special…

An illustration of the formation of capsules about two sporoblasts of Cyclospora Cayetanensis.

Formation of Capsules about the Two Sporoblasts

An illustration of the formation of capsules about two sporoblasts of Cyclospora Cayetanensis.

An isolated ganglion cell of a human, showing sheath with nucleated cell lining, B. A Ganglion cell, with nucleus and nucleolus. C, Branched process. D. Unbranched process.

Ganglion Cell, Structure of

An isolated ganglion cell of a human, showing sheath with nucleated cell lining, B. A Ganglion cell,…

Different forms of ganglion cells. A, a, round ball-shaped unipolar cell from the human Gasserian ganglion. Two cells only show the process f; b, spindle shaped; c, multipolar ganglion cell from he spinal cord of the ox. d, D, Purkinjee ganglion cells from human cerebellum; ax, axis cylinder process; p, protoplasmic process; h, h, two cells surrounded with a nucleated sheath.

Different Forms of Ganglion Cells

Different forms of ganglion cells. A, a, round ball-shaped unipolar cell from the human Gasserian ganglion.…

Nerve cells, also known as nerve corpuscles, comprise the second principle element of the nervous tissue. The are not generally present in the nerve trunk, but are found in collections of nervous tissue called ganglia. Shown are the ganglion nerve corpuscles of different shapes.

Ganglion Nerve Corpuscles

Nerve cells, also known as nerve corpuscles, comprise the second principle element of the nervous tissue.…

A section of the submaxillary gland of a dog. Showing gland cells, b, and a duct, a, in section.

Gland Cells of a Dog

A section of the submaxillary gland of a dog. Showing gland cells, b, and a duct, a, in section.

Alveoli of true salivary gland. A, at rest; B, in the first stage of secretion; C, after prolonged secretion.

Changes in Gland Cells

Alveoli of true salivary gland. A, at rest; B, in the first stage of secretion; C, after prolonged secretion.

Hepatic cells and bile capillaries, from the liver of a child three months old. Both figures represent fragments of a section carried through the periphery of a lobule. The red corpuscles of the blood are recognized by their circular contour; vp, corresponds to an interlobular vein in immediate proximity with which are the epithelial cells of the biliary ducts, to which , at the lower part of the figures, the much larger hepatic cells suddenly succeed.

Hepatic Cells and Bile Capilaries

Hepatic cells and bile capillaries, from the liver of a child three months old. Both figures represent…

Tiny balls of fat in Holstein milk.

Holstein Milk

Tiny balls of fat in Holstein milk.

Section of hyaline cartilage. Labels: a, four separating cells; b, two cells in apposition; c, nuclei; d, cavity in the matrix containing three cells.

Hyaline Cartilage

Section of hyaline cartilage. Labels: a, four separating cells; b, two cells in apposition; c, nuclei;…

The cells of hyaline cartilage are irregular in shape and are generally grouped together. Shown is the ordinary hyaline cartilage from the trachea of a child. The cartilage cells are enclosed singly or in pairs in a capsule of hyaline substance.

Hyaline Cartilage Cells

The cells of hyaline cartilage are irregular in shape and are generally grouped together. Shown is the…

The matrix of hyaline cartilage has a dimly granular appearance like that of ground glass, and in man and higher mammals has no apparent structure. In some cartilages of the frog, however, even when examined in the fresh state, is is seem to be mapped out in polygonal blocks or cell-territories, each containing a cell in the center, and representing what is generally called the capsule of the cartilage cells. Shown is the fresh cartilage from a Triton.

Hyaline Cartilage Cells

The matrix of hyaline cartilage has a dimly granular appearance like that of ground glass, and in man…

Infusoria is an obsolete collective term for minute aquatic creatures like ciliates, euglenoids, protozoa, and unicellular algae that exist in freshwater ponds. In modern formal classifications the microorganisms previously included in the Infusoria are mostly assigned to the Kingdom Protista.

Infusoria

Infusoria is an obsolete collective term for minute aquatic creatures like ciliates, euglenoids, protozoa,…

A vertical section of an intestinal villus of a cat. Labels: a, the striated basilar border of the epithelium; b, columnar epithelium; c, goblet cells; d, centrai lymph vessel; e, unstriped muscular fibers; f, adenoid stroma of the villus in which are contained lymph corpuscles.

Intestinal Villus of a Cat

A vertical section of an intestinal villus of a cat. Labels: a, the striated basilar border of the epithelium;…

Tiny balls of fat in Jersey milk.

Jersey Milk

Tiny balls of fat in Jersey milk.

Karyokinesis. Labels: a, ordinary nucleus of a columnar epithelial cell; B, C, the same nucleus in the stage of convolution; D, the wreath or rosette from; E, the aster, or single star; F, a nuclear spindle the Descemet's endothelium of the frog's cornea; G, H, I, diaster; K, two daughter nuclei.

Karyokinesis

Karyokinesis. Labels: a, ordinary nucleus of a columnar epithelial cell; B, C, the same nucleus in the…

The early stages of karyokinesis. Labels: A, The thicker primary fibers remain and the achromatic spindle appears. B, The thick fibers split into two and the achromatic spindle becomes longitudinal.

Early Stages of Karyokinesis

The early stages of karyokinesis. Labels: A, The thicker primary fibers remain and the achromatic spindle…

The final stage of karyokinesis. In the lower figure the changes are still more advanced than in the upper.

Final Stage of Karyokinesis

The final stage of karyokinesis. In the lower figure the changes are still more advanced than in the…

The monaster stage of karyokinesis.

Monaster Stages of Karyokinesis

The monaster stage of karyokinesis.

Human liver cells.

Liver Cells

Human liver cells.

A, Liver cells. B, Liver cells, containing various sized particles of fat.

Liver Cells

A, Liver cells. B, Liver cells, containing various sized particles of fat.

An illustration of the adult amoeboid Lymphosporidium truttae, which was the cause of the brook-trout epidemic of the 1800s.

Lymphosporidium

An illustration of the adult amoeboid Lymphosporidium truttae, which was the cause of the brook-trout…

An illustration of Lymphosporidium truttae in the blood cell of a brook trout, which was the cause of the brook-trout epidemic of the 1800s.

Lymphosporidium in Blood Cell

An illustration of Lymphosporidium truttae in the blood cell of a brook trout, which was the cause of…

An illustration of Lymphosporidium truttae in the blood cell of a brook trout with numerous sporoblasts, which was the cause of the brook-trout epidemic of the 1800s.

Lymphosporidium in Blood Cell

An illustration of Lymphosporidium truttae in the blood cell of a brook trout with numerous sporoblasts,…

Macrophages containing bacilli and other structures supposed to be undergoing digestion.

Macrophages

Macrophages containing bacilli and other structures supposed to be undergoing digestion.

A termination of a medullated nerve fiber in tendon, lower half with convoluted medullated nerve fiber.

Termination of a Medullated Nerve Fiber

A termination of a medullated nerve fiber in tendon, lower half with convoluted medullated nerve fiber.

"Mesoderm formed by pouches from entoderm after gastrulation. A and B, early and later stages in formation of mesoderm and coelom. a, primitive gut; bp., blastopore; coe, body cavity, formed from pockets of the archenteron; ec., ectoderm; en., entoderm; m., mesoderm; m.so, body-wall mesoderm; m.sp., visceral mesoderm; s.c., segmentation cavity." -Galloway, 1915

Mesoderm Forming

"Mesoderm formed by pouches from entoderm after gastrulation. A and B, early and later stages in formation…

Metakinesis- chromatic figure, spindle. Labels: A, early stage; B, later stage; C, latest stage-formation of disaster.

Metakinesis

Metakinesis- chromatic figure, spindle. Labels: A, early stage; B, later stage; C, latest stage-formation…

From the section through a mucous gland after prolonged electrical stimulation. The alveoli are lined with small granular cells.

Section of a Mucous Gland After Stimulation

From the section through a mucous gland after prolonged electrical stimulation. The alveoli are lined…

From the section through a mucous gland in a quiescent state. The alveoli are lined with transparent mucous cells, and outside these are the semilunes.

Section of a Mucous Gland

From the section through a mucous gland in a quiescent state. The alveoli are lined with transparent…

"A muscle cell from the stomach." — Ritchie, 1918

Muscle cell

"A muscle cell from the stomach." — Ritchie, 1918

Unstriped muscle cells, highly magnified.

Muscle Cells

Unstriped muscle cells, highly magnified.

Fiber-cells of plain muscular tissue, highly magnified.

Muscle Fiber Cells

Fiber-cells of plain muscular tissue, highly magnified.

Unstriped muscle, or plain muscle, forms the proper muscular coats. Shown is unstriped muscle cells from the mesentery of a newt. The sheath exhibits transverse markings. B, from a similar preparation, showing that each muscle cell consists of a central bundle of fibrils, F, (contractile part), connected with the intranuclear network, N, and a sheath with annular thickenings, St. The cells show varicosities due to local contraction, and on these the annular thickenings are most marked.

Unstriped Muscle of a Newt

Unstriped muscle, or plain muscle, forms the proper muscular coats. Shown is unstriped muscle cells…

Network of muscular fibers from the heart of a pig. The nuclei of the muscle corpuscles are well shown

Muscular Fiber Showing the Nuclei of the Muscle Corpuscles

Network of muscular fibers from the heart of a pig. The nuclei of the muscle corpuscles are well shown

Transverse section through muscular fibers of human tongue. The muscle corpuscles are indicated by their deeply stained nuclei situated at the inside of the sarcolemma. Each muscle fiber shows "Cohnheim's fields," that is, the sarcous elements in transverse section separated by clear (apparently linear) interstitial substance.

Muscular Fibers of the Human Tongue

Transverse section through muscular fibers of human tongue. The muscle corpuscles are indicated by their…

A large nerve cell from the ventral horn of the spinal cord. Labels: n, nucleus; n', small body, called the nucleolus, inside the nucleus; p, branched processes; n.p., unbranched process continued into the axis cylinder of a motor nerve fiber.

Nerve Cell

A large nerve cell from the ventral horn of the spinal cord. Labels: n, nucleus; n', small body, called…

Nerve cell. Labels: a, ax, branches of the nerve; n, nucleus of the nerve.

Nerve Cell

Nerve cell. Labels: a, ax, branches of the nerve; n, nucleus of the nerve.

"Nervous tissue is either gray, which is a mass of tailed cells suppoted by a fine connective tissue." — Richardson, 1906

Nerve Cells

"Nervous tissue is either gray, which is a mass of tailed cells suppoted by a fine connective tissue."…

Forms of nerve cells. They each have a nucleus and nucleolus and are connected to each other by means of numerous branches and are found in the brain, spinal cords, and other nerves.

Nerve Cells

Forms of nerve cells. They each have a nucleus and nucleolus and are connected to each other by means…

Label: a, axis cylinder of a nerve.

Nerve Cells

Label: a, axis cylinder of a nerve.

The nerve cells that compose the ganglia are generally unipolar, and seldom bipolar; sometimes two cells are said to exist in the same envelope, constituting the twin cells of Dogiel. The cells are large and have very large nucleoli. Shown are isolated nerve cells from the frog's heart. Labels: I, Usual form. II, Twin cell. C, capsule; N,nucleus; N', nucleolus; P, process.

Nerve Cells

The nerve cells that compose the ganglia are generally unipolar, and seldom bipolar; sometimes two cells…

Nerve terminations, probably sensory in function, are found in inter-muscular tissue. Shown is the termination of medullated nerve fibers in tendon near the muscular insertion.

Termination of Medullated Nerve Fibers

Nerve terminations, probably sensory in function, are found in inter-muscular tissue. Shown is the termination…