This gallery offers 150 ClipArt images of worms. Worms are a general term given to many invertebrate animals that have a long, soft body and no legs.

An illustration of a Acanthobdella, a member of the annelid family.

Acanthobdella

An illustration of a Acanthobdella, a member of the annelid family.

An illustration of a sectional view of a Acanthobdella, a member of the annelid family. "c, Coelom; c.ch, Coelomic epithelium (yellow cells); cg, glandular cells; cl, Muscle cells of lateral line; cp, Pigment cells; ep, Ectoderm; g, Nerve cord; m, Intestine; mc, Circular muscle; ml, Longitudinal muscle; vd, Dorsal vessel; ww, Ventral vessel." (Britannic, 1910)

Sectional View of Acanthobdella

An illustration of a sectional view of a Acanthobdella, a member of the annelid family. "c, Coelom;…

An illustration of a sectional view of a Acanthobdella, a member of the annelid family. "c, Coelom; c.ch, Coelomic epithelium (yellow cells); cg, glandular cells; cl, Muscle cells of lateral line; cp, Pigment cells; ep, Ectoderm; g, Nerve cord; m, Intestine; mc, Circular muscle; ml, Longitudinal muscle; vd, Dorsal vessel; ww, Ventral vessel; cn, nerve cord; nf, parts of nephridium; on, external opening of nephridium; ov, ova; t, testis." (Britannica, 1910)

Sectional View of Acanthobdella

An illustration of a sectional view of a Acanthobdella, a member of the annelid family. "c, Coelom;…

Amphitrite ornata.

Amphitrite Ornata

Amphitrite ornata.

"These animals [the Rotifera], called <em>Wheel Animalcules</em>, were formerly included among the Infusoria, but are now classed with the Articulata: they are chiefly known to us by the microscope, the largest being not over a tenth of an inch long, and many of them only one three-hundredth of an inch." &mdash; Goodrich, 1859

Wheel, animalcule

"These animals [the Rotifera], called Wheel Animalcules, were formerly included among the Infusoria,…

This diagram shows a fresh-water annelid. a, appendages; br., brain; d, dissepiments; i, intestine; m, mouth; nph, nephridium; oe, aesophagus; p, pavilion, line with ciliated entoderm; ph., pharynx; pr., processes from the anal segment; z, zone immediately in front of the anal segment where new segments are continually being formed; z', the zone of fission or budding. This takes place in the middle of a segment. The anterior half-segment of z' will produce a region like z for the anterior half of the worm.

Annelid

This diagram shows a fresh-water annelid. a, appendages; br., brain; d, dissepiments; i, intestine;…

This diagram shows the longitudinal section of the anterior end of the annelid. A, sagittal section; B, frontal section to show anterior portion of nervous system. b, brain; co., nervous collar about the mouth; c.v., contractile blood vessels; d, dissepiment; d.m., dermo-muscular wall; d.v., dorsal blood vessel; m, mouth; n.c., nerve cells; n.f., nerve fibers; np., nephridia; p, prostomium; ph., pharynx; s, setae; sn., segmental nerves; v.g, ventral chain of fanglia; v.v., ventral blood vessel. Only a portion of the blood vascular system is shown, and this appears unsectioned in the figure.

Annelid

This diagram shows the longitudinal section of the anterior end of the annelid. A, sagittal section;…

This diagram shows a transverse section of dero. c., caelom; c.l., cells of the so-called "lateral line"; d.m., dermo-muscular wall including muscles and skin; d.v., dorsal blood vessel; ect, ectoderm; ent, entoderm; g, gut; g.f., giant nerve fibers; gl, glandular cells assisting in digestion; m.c., circular muscle fibers; m.l., longitudinal muscle fibers; n, nephridium; n.v., ventral nerve chain, made up of nerve cells and nerve fibers; s, setae; v.v., ventral blood vessel.

Annelid

This diagram shows a transverse section of dero. c., caelom; c.l., cells of the so-called "lateral line";…

"The <em>Leodice antennata</em> has the organs of locomotion attached to each segment; they are usually in the form of movable spines, and are used as oars." &mdash; Goodrich, 1859

Leodice antennata

"The Leodice antennata has the organs of locomotion attached to each segment; they are usually…

"Cross-section of Arenicola. E., Epidermis; c.m., circular muscles; l.m., longitudinal muscles; b.c., body cavity; gl., gill; s., setae; n.p., nephridial pore; a.br., afferent branchial; e.br., efferent branchial; n., ventral nerve-cord, with blood vessels above; d.v., dorsal vessel; l.v., lateral vessel; s.i.v., sub-intestinal vessels; v.v., ventral vessel; g., gut." -Thomson, 1916

Arenicola

"Cross-section of Arenicola. E., Epidermis; c.m., circular muscles; l.m., longitudinal muscles; b.c.,…

"Cross-section through Ascaris. d.n., Dorsal nerve; n.c., non-contractile portion of muscle cells; c., cuticle; e., epidermis; l.l., lateral line; e.v., excretory vessel; m., contractile portion of muscle cells; v.n., ventral nerve; ov., ovary; ut., uterus; g., gut." -Thomson, 1916

Ascaris

"Cross-section through Ascaris. d.n., Dorsal nerve; n.c., non-contractile portion of muscle cells; c.,…

"Male of Balanoglossus (Dolichoglossus) kowalevskii. Note anterior proboscis. Mo., Mouth; op., slight operculum behind the collar; then the region with gill-slits; ts., testes; a., anus." -Thomson, 1916

Balanoglossus

"Male of Balanoglossus (Dolichoglossus) kowalevskii. Note anterior proboscis. Mo., Mouth; op., slight…

"Diagrams of bladder-worms. I. The ordinary Cysticercus type with one head (H.). II. The Coenurus type, with many heads. III. The Echinococcus type, with many heads, and with brood capsules producing many heads." -Thomson, 1916

Bladder-Worms

"Diagrams of bladder-worms. I. The ordinary Cysticercus type with one head (H.). II. The Coenurus type,…

This illustration shows a representation of the circulation of the blood, in its essential features. The arrows indicate the course of the blood. a, arteries; aur., auricle or receiving portion of the heart; d, digestive tract; c. d., capillaries of the digestive tract; c.r., capillaries of the respiratory organs; c.s., capillaries of the system; va., valves; ve, veins; vt, ventricle.

Blood Circulation

This illustration shows a representation of the circulation of the blood, in its essential features.…

Illustration of a female green spoonworm. A, Proboscis cut short; B, bristle passing though the mouth into the pharynx; C, coiled intestine; D, anal tufts or vesicles; E, ventral nerve cord; F, ovary borne on ventral vessel running parallel with e; G, position of anus; H,, position of external opening of; I, nephridium --- the line points towards, but does not reach, the internal opening.

Bonellia Viridis (Female)

Illustration of a female green spoonworm. A, Proboscis cut short; B, bristle passing though the mouth…

Illustration of a male green spoonworm. A, Bonellia viridis; B, mouth; C, ventral hooks; and d, anus. The Green Spoonworm (Bonellia viridis) is a marine worm (phylum Echiura) noted for displaying exceptional sexual dimorphism and for the biocidal properties of a pigment in its skin

Bonellia Viridis (Male)

Illustration of a male green spoonworm. A, Bonellia viridis; B, mouth; C, ventral hooks; and d, anus.…

Illustration of a male green spoonworm. A, Generative pore with spermatozoa; B, Anterior blind end of intestine attached to the parenchymatous tissue by muscular strands; C, Green wandering cells containing chlorophyll; D, Parenchymatous connective tissue; Epidermis, I, Intestine; J, Vas deferens; L, Internal opening of vas deferens; M, The left anal vesicle; and M, Spermatozoa in the body-cavity.

Bonellia Viridis (Male)

Illustration of a male green spoonworm. A, Generative pore with spermatozoa; B, Anterior blind end of…

"Bladderworm stage of a Cestode...a, Early stage with head inverted. b, Later stage with head everted." -Thomson, 1916

Cestode

"Bladderworm stage of a Cestode...a, Early stage with head inverted. b, Later stage with head everted."…

Chaetognatha is a phylum of predatory marine worms that are a major component of plankton worldwide. About 20% of the known species are benthic and can attach to algae or rocks. They are found in all marine waters from surface tropical waters and shallow tide pools to the deep sea and polar regions. Most chaetognaths are transparent and are torpedo shaped. Some deep-sea species are orange. They range in size from 2 mm to 12 cm. The common term for the phylum is Arrow Worms. There are more than 120 modern species assigned to over 20 genera. Despite the limited diversity of species, the number of individuals is staggering.

Chaetognatha

Chaetognatha is a phylum of predatory marine worms that are a major component of plankton worldwide.…

Anterior part of the circulatory system of an annelid. The arrows indicate the direction of the flow. H, heart-like enlargement of the commissural vessel.

Circulatory System of an Annelid

Anterior part of the circulatory system of an annelid. The arrows indicate the direction of the flow.…

"The <em>Serpulae</em>, which form irregularly twisted calcareous tubes, often grow together in large masses, generally attached to shells and similar objects; while those genera which, like the <em>Terebella</em>, build their residences of sand and stones, appear to prefer a life of single blessedness." &mdash; Goodrich, 1859

Serpula contortiplicata

"The Serpulae, which form irregularly twisted calcareous tubes, often grow together in large…

An illlustration of a dasychone infracta, a type of annelid. The annelids, collectively called Annelida (from Latin anellus "little ring"), are a large phylum of animals comprising the segmented worms, with about 15,000 modern species including the well-known earthworms and leeches.

Dasychone Infracta

An illlustration of a dasychone infracta, a type of annelid. The annelids, collectively called Annelida…

"Demoscolecida, a group of minute marine worm-like creatures. The body tapers towards each end and is marked by a number f well define ridges." -Britannica, 1910

Demoscolecida

"Demoscolecida, a group of minute marine worm-like creatures. The body tapers towards each end and is…

"The bodies of these animals are of a cylindrical form, somewhat pointed at the anterior extremity, and usually a little flattened at the tail. The skin is tough, and divided into numerous segments by transverse wrinkles, and the organs of motion are reduced to the form of a double row of bristles, running down the lower surface of the body." &mdash; Goodrich, 1859

Earth-worms

"The bodies of these animals are of a cylindrical form, somewhat pointed at the anterior extremity,…

The earthworm works through the ground by insinuating its pointed head between the grains of dirt, (Hooker, 1882).

Earthworm

The earthworm works through the ground by insinuating its pointed head between the grains of dirt, (Hooker,…

Side view of internal structures of earthworm.

Earthworm

Side view of internal structures of earthworm.

Dorsal view of internal structures of earthworm after cutting through the dorsal wall lengthwise and turning it outward.

Earthworm

Dorsal view of internal structures of earthworm after cutting through the dorsal wall lengthwise and…

Cross section of earthworm.

Earthworm

Cross section of earthworm.

Earthworms are segmented worms that live in the earth.

Earthworm

Earthworms are segmented worms that live in the earth.

"Transverse section of the intestine of the Earthworm. ty, typhlosole, an infolded longitudinal ridge in the gut in which the fland cells (gl.) are especially aggregated." &mdash; Galloway

Earthworm

"Transverse section of the intestine of the Earthworm. ty, typhlosole, an infolded longitudinal ridge…

The earthworm.

Earthworm

The earthworm.

"Anterior region of earthworm. Note the eight setae (s.) on each segment. R.S., Spots between 9-10, 10-11, indicate openings of receptacula seminis; Ovd., openings of oviducts on segment 14/ vd., openings of vasa deferentia on segment 13." -Thomson, 1916

Earthworm

"Anterior region of earthworm. Note the eight setae (s.) on each segment. R.S., Spots between 9-10,…

"Transverse section of earthworm. A., Cuticle; B., epidermis; C.M., circular muscles; L.M., longitudinal muscles; D., a seta; C., coelom; Y.C., yellow cells; F., typhlosole; V.V., supra-neural blood vessel; S.V., sub-neural vessel; D.V., dorsal vessel; P., peritoneum; E., cavity of gut; G., endodermic lining of gut; N., part of a nephridium; R., opening of a nephridium; I., the nerve-cord; J., a nerve given off; K., giant fibres in the nerve-cord." -Thomson, 1916

Earthworm

"Transverse section of earthworm. A., Cuticle; B., epidermis; C.M., circular muscles; L.M., longitudinal…

An illustration of an earthworm. The basic body plan of an earthworm is a tube, the digestive system, within a tube, the muscular outer body. The body is annular, formed of segments that are most specialized in the anterior. Earthworms have a simple circulatory system. They have two main blood vessels that extend through the length of their body: a ventral blood vessel which leads the blood to the posterior end, and a dorsal blood vessel which leads to the anterior end. Most earthworms are decomposers feeding on undecayed leaf and other plant matter, others are more geophagous.

Earthworm

An illustration of an earthworm. The basic body plan of an earthworm is a tube, the digestive system,…

"Diagrams of various earthworms to illustrate external characters. A, B, C, anterior segments from the ventral surface; D, hinder end of the body of Urochaeta." (Britannica, 1910)

Earthworm

"Diagrams of various earthworms to illustrate external characters. A, B, C, anterior segments from the…

The earthworms are also known as megadriles, in the families Tubificidae, Lumbriculidae, and Enchytraeidae, among others. The basic body plan is a tube, the digestive system, within a tube, the muscular slimy, moist outer body. The body is annular, formed of segments that are most specialized in the anterior and have a simple circulatory system. They have two main blood vessels that extend through the length of their body: a ventral blood vessel which leads the blood to the posterior end, and a dorsal blood vessel which leads to the anterior end. The dorsal vessel is contractile and pumps blood forward, where it is pumped into the ventral vessel by a series of "hearts" (aortic arches) which vary in number in the different taxa.

Earthworm

The earthworms are also known as megadriles, in the families Tubificidae, Lumbriculidae, and Enchytraeidae,…

The earthworms are also known as megadriles, in the families Tubificidae, Lumbriculidae, and Enchytraeidae. Earthworms have a pair of kidneys to every segment, each consisting of a coiled tube wrapped in a mass of small blood vessels, and at its inner end communicating with the body cavity by means of a funnel-shaped opening. Here is a diagram of an earthworm kidney., showing (b) blood vessel, (f) funnel opening into body cavity, (o) outer opening, (s)septum, (w) body wall

Earthworm Anatomy

The earthworms are also known as megadriles, in the families Tubificidae, Lumbriculidae, and Enchytraeidae.…

An illustration of an earthworm escaping a cocoon.

Earthworm Escaping Cocoon

An illustration of an earthworm escaping a cocoon.

An illustration of the reproductive system of a female earthworm which is located in the eleventh to the fourteenth segment. "sp. o, its external orifice; sp. sac, spermathecal sac; av, sac containing ovary; r.o, egg; od, oviuct." (Britannica. 1910)

Female Earthworm Reproductive System

An illustration of the reproductive system of a female earthworm which is located in the eleventh to…

An enlargement of the reproductive organs of a earthworm. "sp, Spermatheca; sp',Spermathecal sac involving the last; ov, Ovary; r.o. Egg sac; od, Oviduct." (Britannica, 1910)

Female Earthworm Reproductive System

An enlargement of the reproductive organs of a earthworm. "sp, Spermatheca; sp',Spermathecal sac involving…

An illustration of the various types of earthworm setae. Seta (plural: setae) is a biological term derived from the Latin word for "bristle". It refers to a number of different bristle- or hair-like structures on living organisms. "A, penial seta of Perichaeta ceylonica; b, extremity of penial seta of Acanthodrilus; c, Seta of Urochaeta; d, Seta of Lumbricus; e, Seta of Criodrilus; f, g, Setae of Bohemilla comata; h, i, j, Setae of Psammoryctes barbatus." (Britannica, 1910)

Setae of Earthworm

An illustration of the various types of earthworm setae. Seta (plural: setae) is a biological term derived…

A cross sectional view of the Dicyemennea Eledones, a parasite, found in Eledone Moschata, or musky octopus.

Dicyemennea Eledones Worm Found in Kidney of Octopus

A cross sectional view of the Dicyemennea Eledones, a parasite, found in Eledone Moschata, or musky…

Euchone elegans is a species of marine worms in the family, Terebellidae, sometimes known as spaghetti worms.

Euchone

Euchone elegans is a species of marine worms in the family, Terebellidae, sometimes known as spaghetti…

Hook baited with worm.

Fishing

Hook baited with worm.

Diagrammatic sketch of a flatworm (Planaria)

Flatworm

Diagrammatic sketch of a flatworm (Planaria)

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds, or along the seacoast while a variety of other species are parasitic. The free forms are usually small, barely reaching a length greater than five or seven cetimeters (2 to 3 inches). Some of the parasitic species attain the great length of six to thirteen meters (20 to 40 feet). This is a fresh water flatworm.

Flatworm

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds,…

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds, or along the seacoast while a variety of other species are parasitic. The free forms are usually small, barely reaching a length greater than five or seven cetimeters (2 to 3 inches). Some of the parasitic species attain the great length of six to thirteen meters (20 to 40 feet). This is a marine flatworm.

Flatworm

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds,…

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds, or along the seacoast while a variety of other species are parasitic. The free forms are usually small, barely reaching a length greater than five or seven cetimeters (2 to 3 inches). Some of the parasitic species attain the great length of six to thirteen meters (20 to 40 feet). This is a fresh water flatworm. This is an anatomy of freshwater flatworm (Planaria), showing the excretory system, with flame-cell. The alimentary canal is stippled.

Flatworm

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds,…

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds, or along the seacoast while a variety of other species are parasitic. The free forms are usually small, barely reaching a length greater than five or seven cetimeters (2 to 3 inches). Some of the parasitic species attain the great length of six to thirteen meters (20 to 40 feet). This shows the nervous system of the flatworm.

Flatworm

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds,…

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds, or along the seacoast while a variety of other species are parasitic. The free forms are usually small, barely reaching a length greater than five or seven cetimeters (2 to 3 inches). Some of the parasitic species attain the great length of six to thirteen meters (20 to 40 feet). This is the flame-cell of the flatworm showing the flagellum (f), the nucleus (n), space among the organs of the body, (v) waste material.

Flatworm

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds,…

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds, or along the seacoast while a variety of other species are parasitic. Some of the parasitic species attain the great length of six to thirteen meters (20 to 40 feet). This parasitic flatworm diagram shows the (m) mouth, the (o) opening of the reproductive system, and (s) sucker and spines for attachment. The digestive system is stippled and the nervous system is black.

Flatworm

Flatworms are flattened, leaf-like forms living in damp places on land, in freshwater streams of ponds,…

The liver fluke is a parasitic flatworm that lives in the liver of sheep.

Fluke

The liver fluke is a parasitic flatworm that lives in the liver of sheep.

Gepyrea is a name formerly given to a class of worms which included three families: (1) Priapulidae; (2) Sipunculidae; (3) Echiuridae. The three families have little in common, and the class Gephyrea has ceased to exist in strict systematic zoology. This illustration shows and example from each of the three families: (1) Priapulus caudatus; (2) Sipunculus nudus; (3) Echiurus Pallasi.

Gephyrea

Gepyrea is a name formerly given to a class of worms which included three families: (1) Priapulidae;…

Illustration showing different rhompalura gairdii flat worms. The left and the right worms are the female, and the middle is the full grown male.

Rhopalura Gairdii Flat Worm

Illustration showing different rhompalura gairdii flat worms. The left and the right worms are the female,…

This illustration shows a transverse section of a worm with external gills. Gills are the breathing organs of aquatic animals.

Gills (worm)

This illustration shows a transverse section of a worm with external gills. Gills are the breathing…

"The Young Variable Gordius, after escaping from the egg. a, the worm beginning to protrude the oral apparatus." -Whitney, 1911

Gordian Worm

"The Young Variable Gordius, after escaping from the egg. a, the worm beginning to protrude the oral…

"The Young Variable Gordius, after escaping from the egg. b, the first circle of hooklets bordering the collar reflected, and protrusion of the second circle of hooklets and the style." -Whitney, 1911

Gordian Worm

"The Young Variable Gordius, after escaping from the egg. b, the first circle of hooklets bordering…

"The Young Variable Gordius, after escaping from the egg. c, complete protrusion of both circles of hooklets and the style." -Whitney, 1911

Gordian Worm

"The Young Variable Gordius, after escaping from the egg. c, complete protrusion of both circles of…

Echinoderes dujardini is a worm-like creature in the Kinorhyncha phylum of mud dragons.

Kinorhynch

Echinoderes dujardini is a worm-like creature in the Kinorhyncha phylum of mud dragons.

Leeches are parasitic worms.

Leech

Leeches are parasitic worms.