The Cellular Biology ClipArt gallery offers 240 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.

Auerbach's nerve plexus in the small intestine. The plexus consist of fibrillated substance, and is made up of trabeculae of various thicknesses. Nucleus-like elements and ganglion cells are imbedded in the plexus, the whole of which is enclosed in a nucleated sheath.

Auerbach's Nerve Plexus

Auerbach's nerve plexus in the small intestine. The plexus consist of fibrillated substance, and is…

Forms of nerve-cells.

Nerve-Cells

Forms of nerve-cells.

Diagram of a neuron.

The Nervous System

Diagram of a neuron.

"Showing a motor cell with its long, unbranched process (with two little lateral offshoots), with motor endings in striated, voluntary muscular tissue." — Blaisedell, 1904

Neuron

"Showing a motor cell with its long, unbranched process (with two little lateral offshoots), with motor…

"A nerve cell from the brain." — Ritchie, 1918

Neuron

"A nerve cell from the brain." — Ritchie, 1918

Diagram of a neuron. Labels: A, axon arising from the cell-body and branching at its termination; D, dendrites; C and N, cell-body composed of C, cytoplasm, and N, nucleus.

Diagram of a Neuron

Diagram of a neuron. Labels: A, axon arising from the cell-body and branching at its termination; D,…

Semidiagrammatic representation of structure of a neuron; a, axon.

Structure of a Neuron

Semidiagrammatic representation of structure of a neuron; a, axon.

Multipolar nerve cells of various forms. Labels: A, from spinal cord; B, from cerebral cortex; C, from cerebellar cortex (Purkinje cell); a, axon; c, implantation cone.

Various Forms of Neurons

Multipolar nerve cells of various forms. Labels: A, from spinal cord; B, from cerebral cortex; C, from…

The nucleus when in a condition of rest is bounded by a distinct membrane, possibly derived from the spongioplasm of the cell. Shown is a diagram of a resting nucleus.

Nucleus at Rest

The nucleus when in a condition of rest is bounded by a distinct membrane, possibly derived from the…

Diagrams of the nucleus showing the arrangement of chief chromatic filaments. A, Viewed from the side, the polar end being uppermost. Labels: p.c.f., primary chromatic filaments; n, nucleolus; n.o.m., node of meshwork. B, Viewed at the polar end. Labels: l.c.f., lopped chromatic filament; i.f., irregular filament.

Nucleus Showing Chromatic Filaments

Diagrams of the nucleus showing the arrangement of chief chromatic filaments. A, Viewed from the side,…

Longitudinal section of ossifying cartilage from the humerus of a fetal sheep. Calcified trabeculae are seen extending between he columns of cartilage cells (c).

Ossifying Cartilage Showing Calcification

Longitudinal section of ossifying cartilage from the humerus of a fetal sheep. Calcified trabeculae…

The diagram of a human ovum undergoing segmentation. Labels: a, human ovum; b, ovum divided into two; c, ovum divided into four; d, process has ended in the production of the so-called mulberry mass.

The Human Ovum Undergoing Segmentation

The diagram of a human ovum undergoing segmentation. Labels: a, human ovum; b, ovum divided into two;…

The diagram of a human ovum, showing the parts of an animal cell.

A Diagram of the Human Ovum

The diagram of a human ovum, showing the parts of an animal cell.

The Pacinian bodies or corpuscles are elongated oval bodies situated on some of the cerebrospinal and sympathetic nerves, especially the cutaneous nerves of the hands and feet; and on branches of the large sympathetic plexus about the abdominal aorta. Shown is a Pacinian corpuscle of the cat's mesentery. The stalk consist of a nerve fiber (N) wit its think outer sheath. The peripheral capsules of the Pacinian corpuscle are narrower near the entrance of the axis cylinder into the clear central mass. A hook-shaped termination with the end bulb; it possesses a sheath which is the continuation of the peripheral capsules of the Pacinian corpuscle.

Pacinian Corpuscle of a Cat

The Pacinian bodies or corpuscles are elongated oval bodies situated on some of the cerebrospinal and…

The Pacinian bodies or corpuscles are elongated oval bodies situated on some of the cerebrospinal and sympathetic nerves, especially the cutaneous nerves of the hands and feet; and on branches of the large sympathetic plexus about the abdominal aorta. Shown is the summit of a Pacinian corpuscle of a human finger, showing the endothelial membranes linking the capsules.

Pacinian Corpuscle of a Human

The Pacinian bodies or corpuscles are elongated oval bodies situated on some of the cerebrospinal and…

The Pacinian bodies or corpuscles are elongated oval bodies situated on some of the cerebrospinal and sympathetic nerves, especially the cutaneous nerves of the hands and feet; and on branches of the large sympathetic plexus about the abdominal aorta. Shown are the extremities of a nerve of the finger with Pacinian corpuscles attached.

Pacinian Corpuscles in a Human

The Pacinian bodies or corpuscles are elongated oval bodies situated on some of the cerebrospinal and…

Paramecia (Slipper Animalcule), also known as Lady Slippers, due to their appearance, are a group of unicellular ciliate protozoa. Paramecia aurelia, a ciliate infusorian, (c) cilia; (c.v.) pulsating vacuoles; (f) food particles; (g) fullet; (m) buccal groove; (n) nucleus.

Paramecia

Paramecia (Slipper Animalcule), also known as Lady Slippers, due to their appearance, are a group of…

Ramified pigment cells, from the tissue of the choroid coat of the eye. Labels: a, cell with pigment; b, colorless fusiform cells.

Pigment Cells

Ramified pigment cells, from the tissue of the choroid coat of the eye. Labels: a, cell with pigment;…

Squamous epithelium is found arranged as a single layer of flattened cells as the pigmentary layer of the retina. Shown is the pigment cells from the retina. A, cells still cohering, seen on their surface; a, nucleus indistinctly seen. In the other cells the nucleus is concealed by the pigment granules. B, two cells seen in profile; a, the outer or posterior part containing scarcely any pigment.

Pigment Cells from the Retina

Squamous epithelium is found arranged as a single layer of flattened cells as the pigmentary layer of…

"Cell of Pellionia Daveauana, showing starch-grains. The black, crescent-shaped body on the end of each grain is the amyloplast." -Gager, 1916

Pellionia Plant Cell

"Cell of Pellionia Daveauana, showing starch-grains. The black, crescent-shaped body on the end of each…

Cells of a raw potato, with starch grains in natural condition.

Potato Cells

Cells of a raw potato, with starch grains in natural condition.

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds, and certain insects. is is a parasite living at the expense of the host in whose whose body it lives in. This is a Gregarinid (Actinocephalus oligacanthus) from the intestine of an insect.

Protozoan

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds,…

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds, and certain insects. It is a parasite living at the expense of the host in whose whose body it lives in. This is a spore forming by a Gregarinid (Cocidium oviforme) from the liver of a guinea-pig.

Protozoan

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds,…

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds, and certain insects. It is a parasite living at the expense of the host in whose whose body it lives in. This is a spore forming by a Gregarinid (Cocidium oviforme) from the liver of a guinea-pig.

Protozoan

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds,…

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds, and certain insects. It is a parasite living at the expense of the host in whose whose body it lives in. A stage in the conjugation and spore forming of Gregarina polymopha.

Protozoan

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds,…

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds, and certain insects. It is a parasite living at the expense of the host in whose whose body it lives in. A stage in the conjugation and spore forming of Gregarina polymopha.

Protozoan

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds,…

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds, and certain insects. It is a parasite living at the expense of the host in whose whose body it lives in. A stage in the conjugation and spore forming of Gregarina polymopha.

Protozoan

Gregarina, a protozoan, various species which live in the alimentary canal of crayfishes, centipeds,…

Acetic acid (dilute) causes the nucleus of the red blood cells in the frog to become more clearly defined; if the action is prolonged, the nucleus becomes strongly granulated, and all the coloring matter seems to be concentrated in it, the surrounding cell substance and outline of the cell becoming almost invisible; after a time the cells lose their color altogether. The cells shown represent the successive stages of change. A similar loss of color occurs in the red cells of human blood, which , however, from the absence of nuclei, seem to disappear entirely.

Effect of Acetic Acid on Red Blood Cells

Acetic acid (dilute) causes the nucleus of the red blood cells in the frog to become more clearly defined;…

A 2 percent solution of boric acid applied to nucleated red blood cells of a frog will cause the concentration of all he coloring matter in the nucleus; the colored body thus formed gradually quits its central position , and comes to be partly, sometime entirely, protruded from the surface of the now colorless cell. When applied to non-nucleated mammalian corpuscle its effect merely resembles that of other dilute acids.

Effect of Boric Acid on Red Blood Cells

A 2 percent solution of boric acid applied to nucleated red blood cells of a frog will cause the concentration…

If the red blood cells of a frog be first exposed to the action of water vapor (which renders their outer pellicle more readily permeable to gases), and then acted on by carbonic acid, the nuclei immediately become clearly defined and strong granulated, when air or oxygen is admitted the original appearance is at once restored. The upper and lower cells in this figure show the effect of carbonic acid; the middle one the effect of the readmission of air. The effects can be reproduced five or six times in succession. If, however, the action of the carbonic acid be much prolonged, the granulated of the nucleus become permanent; it appears to depend on a coagulation of the paraglobulin.

Effect of Gases on Red Blood Cells

If the red blood cells of a frog be first exposed to the action of water vapor (which renders their…

The effect of heat on red blood cells up to 50-60 degrees C. (120-140 degrees F.) is to cause the formation of a number of bud-like processes.

Effect of Heat on Red Blood Cells

The effect of heat on red blood cells up to 50-60 degrees C. (120-140 degrees F.) is to cause the formation…

When a 2 percent fresh solution of tannic acid is applied to frog's blood it causes the appearance of a sharply defined little knob, projecting from the free surface (Robert's macula): the coloring matter becomes at the same concentrated in the nucleus, which grows more distinct. A somewhat similar effect is produced on the human blood corpuscle.

Effect of Tannin on Red Blood Cells

When a 2 percent fresh solution of tannic acid is applied to frog's blood it causes the appearance of…

Red marrow occupies the spaces in the cancellous tissue; it is highly vascular, and this maintains the nutrition of the spongy bone, the interstices of which it fills. Shown are the cells of the red marrow of the the guinea pig. Labels; a, a large cell, the nucleus of which appears to be partly divided into three by constrictions; b, a cell, the nucleus of which shows an appearance of being constricted into a number of smaller nuclei; c, so called giant cell, or myeloplaxe, with many nuclei; d, a smaller myeloplaxe, with three nuclei; e-i, proper cells of the marrow.

Cells of the Red Marrow

Red marrow occupies the spaces in the cancellous tissue; it is highly vascular, and this maintains the…

From a section through a true salivary gland. Labels: a, the gland alveoli, lined with albuminous "salivary cells;" b, intralobular duct cut transversely.

True Salivary Gland

From a section through a true salivary gland. Labels: a, the gland alveoli, lined with albuminous "salivary…

The phylum Sarcomastigophora belongs to the Protist kingdom and it includes many unicellular or colonial, autotrophic, or heterotrophic organisms. The two main subphyla are Mastigophora and Sarcodina. A third is Opalinata.

Sarcomastigophora

The phylum Sarcomastigophora belongs to the Protist kingdom and it includes many unicellular or colonial,…

A sieve cell is a tubular cell having its wall one or more sharply circumscribed thin areas which are perforated as to resemble a sieve.

Sieve Cell

A sieve cell is a tubular cell having its wall one or more sharply circumscribed thin areas which are…

"Spherical cell (resting stage of Amoeba) illustrating general or universal symmetry. Any plane passing through the center will divide it into two essentially equal portions." — Galloway

Spherical Cell

"Spherical cell (resting stage of Amoeba) illustrating general or universal symmetry. Any plane passing…

The spheroidal ciliated cells from the mouth of a frog.

Spheroidal Ciliated Cells from a Frog

The spheroidal ciliated cells from the mouth of a frog.

An illustration of the liberation of Cyclospora Cayetanensis spores.

Liberation of Spores

An illustration of the liberation of Cyclospora Cayetanensis spores.

Squamous epithelium scales from the inside of the mouth.

Squamous Epithelium Scales

Squamous epithelium scales from the inside of the mouth.

An illustration of corn starch cells.

Corn Starch

An illustration of corn starch cells.

An illustration of potato starch cells.

Potato Starch

An illustration of potato starch cells.

An illustration of wheat starch cells.

Wheat Starch

An illustration of wheat starch cells.

Taste goblet from dog's epiglottis (laryngeal surface near the base) , precisely similar in structure to those found in the tongue. Labels: a, depression in epithelium over goblet; below the letter are seen the fine hair-like processes in which the cells terminate; c, two nuclei of the axial (gustatory) cells. The more superficial nuclei belong to the superficial (encasing) cells; the converging lines indicate the fusiform shape of the encasing cells.

Taste Goblet from Dog's Epiglottis

Taste goblet from dog's epiglottis (laryngeal surface near the base) , precisely similar in structure…

The branched character of the cells is seen. Shown is a transverse section from a cross section of the tail of a rabbit, showing sheath, fibrous septa, and branched connective tissue corpuscles. The spaces left white in the drawing represent the tendinous fibers in transverse section.

Branched Tendon Cells

The branched character of the cells is seen. Shown is a transverse section from a cross section of the…

The cells in the tendons are arranged in long chains in the ground substance separating the bundle of fibers, and are more or less regularly quadrilateral with large round nuclei containing nucleoli, which are generally places so as to be contiguous in two cells. Show is the caudal tendon of young rat. Note arrangement, form, and structure of tendon cells.

Structure of Tendon Cells

The cells in the tendons are arranged in long chains in the ground substance separating the bundle of…

Trypanosoma are of the class kinetoplastida, a monophyletic group of unicellular parasitic protozoa. The name is derived from the Greek trypaô (boring) and soma (body) because of their corkscrew-like motion. Trypanosomes infect a variety of hosts and cause various disease, including the fatal disease sleeping sickness in humans.

Trypanosoma

Trypanosoma are of the class kinetoplastida, a monophyletic group of unicellular parasitic protozoa.…

Trypanosoma are of the class kinetoplastida, a monophyletic group of unicellular parasitic protozoa. The name is derived from the Greek trypaô (boring) and soma (body) because of their corkscrew-like motion. Trypanosomes infect a variety of hosts and cause various disease, including the fatal disease sleeping sickness in humans.

Trypanosoma

Trypanosoma are of the class kinetoplastida, a monophyletic group of unicellular parasitic protozoa.…

Diagram of a vegetable cell, such as it would be if when spherical it were equally pressed by similar surrounding cells in a heap.

Vegetable Cell

Diagram of a vegetable cell, such as it would be if when spherical it were equally pressed by similar…

A vegetable cell.

Vegetable Cell

A vegetable cell.

A, A young vegetable cell, showing cell cavity entirely filled with granular protoplasm enclosing a large oval nucleus with one or more nucleoli. B, An older cells from the same plant showing distinct cellulose wall and vacuolation of protoplasm.

Vegetable Cell

A, A young vegetable cell, showing cell cavity entirely filled with granular protoplasm enclosing a…

The Bell Animalcule (Vorticella) (fig 10) in certain respects resembles the Slipper Animalcule. It is generally attached by a slender stalk, and where many are growing together they appear like a delicate growth of mold upon the water weed. In figure 10 we see Vorticlla, an attached ciliate infusorian, highly magnified. (a) fully extented individual, (c.v.) pulsating vaculoe; (g) gullet; (n) nucleus. (b) contracted specimen, (c) small free-swimming individual, which unites with a statinary individual (one partly united is shown in specimen b).

Vorticella

The Bell Animalcule (Vorticella) (fig 10) in certain respects resembles the Slipper Animalcule. It is…

Tissue of the jelly of Wharton from a umbilical cord. Labels: a, connective tissue corpuscles; b, fasciculi of connective tissue; c, spherical formative cells.

The Tissue of Whartonian Jelly

Tissue of the jelly of Wharton from a umbilical cord. Labels: a, connective tissue corpuscles; b, fasciculi…

A white blood corpuscle sketched at successive intervals of a few seconds to illustrate the change of form due to tis amoeboid movements.

White Blood Corpuscle

A white blood corpuscle sketched at successive intervals of a few seconds to illustrate the change of…

White fibrocartilage is composed of both cells and a matrix, but is almost exclusively composed of fibers resembling those of white fibrous tissue.

White Fibrocartilage

White fibrocartilage is composed of both cells and a matrix, but is almost exclusively composed of fibers…

White fibrocartilage from an intervertebral ligament.

White Fibrocartilage

White fibrocartilage from an intervertebral ligament.

An illustration of Xiphacantha showing the siliceous skeleton.

Xiphacantha

An illustration of Xiphacantha showing the siliceous skeleton.

The cells in yellow elastic cartilage are rounded or oval, with well marked nuclei and nucleoli.

Yellow Elastic Cartilage

The cells in yellow elastic cartilage are rounded or oval, with well marked nuclei and nucleoli.

Diagram of the various stages of cleavage of the yolk.

Stages of Cleavage of the Yolk

Diagram of the various stages of cleavage of the yolk.

An illustration of the division of a zygote of Cyclospora Cayetanensis into two sporoblasts.

Division of Zygote

An illustration of the division of a zygote of Cyclospora Cayetanensis into two sporoblasts.