ClipArt ETC
Of the crowfoot family (Ranunculaceae): left, thimble-weed (Anemone Virginiana); right, large white-flowered anemone (Anemone riparia).

Thimble-Weed and Large White-Flowered Anemone

Of the crowfoot family (Ranunculaceae): left, thimble-weed (Anemone Virginiana); right, large white-flowered…

Of the crowfoot family (Ranunculaceae), the flower of the white baneberry or Actaea alba.

White Baneberry

Of the crowfoot family (Ranunculaceae), the flower of the white baneberry or Actaea alba.

Of the crowfoot family (Ranunculaceae): large image: the red baneberry or Actaea rubra; bottom right: fruit of the white baneberry or Actaea alba.

Red Baneberry

Of the crowfoot family (Ranunculaceae): large image: the red baneberry or Actaea rubra; bottom right:…

Of the barberry family (Berberidaceae), the seeds of the blue cohosh or Caulophyllum thalictroides.

Blue Cohosh Seeds

Of the barberry family (Berberidaceae), the seeds of the blue cohosh or Caulophyllum thalictroides.

Of the pulse family (Leguminosae): left, blue false indigo (Baptisia australis); right, wild indigo (Baptisia tinctoria).

Blue False Indigo and Wild Indigo

Of the pulse family (Leguminosae): left, blue false indigo (Baptisia australis); right, wild indigo…

Of the spurge family (Euphorbiaceae), the white margined spurge or Snow on the Mountain (Euphorbia marginata).

White Margined Spurge

Of the spurge family (Euphorbiaceae), the white margined spurge or Snow on the Mountain (Euphorbia marginata).

Of the violet family (Violaceae), the blue violet or Viola papilionacea.

Blue Violet

Of the violet family (Violaceae), the blue violet or Viola papilionacea.

Of the violet family (Violaceae): left, sweet white violet (Viola blanda); right, lance-leaved violet (Viola lanceolata).

Sweet White Violet and Lance-Leaved Violet

Of the violet family (Violaceae): left, sweet white violet (Viola blanda); right, lance-leaved violet…

"Larva, pupa, and adult of blue-bottle fly (Musca vomitoria)." -Thomson, 1916

Blue-Bottle Fly Stages

"Larva, pupa, and adult of blue-bottle fly (Musca vomitoria)." -Thomson, 1916

"Diagrammatic section of spinal cord. p.f., Posterior fissure; p.c., posterior column of white matter; d.p.s., dorsal, posterior, sensory or afferent root; g., ganglion; v.a.m., ventral, anterior, motor or efferent root; c.n., compound spinal nerve with branches; s.g., sympathetic ganglion; a.c., anterior column--the anterior fissure is exaggerated; g.c., ganglion cells; g.m., grey matter; w.m., white matter." -Thomson, 1916

Vertebrate Spinal Cord

"Diagrammatic section of spinal cord. p.f., Posterior fissure; p.c., posterior column of white matter;…

A portion of fibrin, showing its fibrous structure and netlike arrangement of its fibers. In a short time after the blood is taken from the body it separates into two portions, by a process called coagulation or clot; the white substance which forms the upper part of the clot is called fibrin, and the red mass under it, the red particles. The fibrin is the material from which all solids of the body are formed.

Blood Clotting Fibers

A portion of fibrin, showing its fibrous structure and netlike arrangement of its fibers. In a short…

"Diagram of a cross-section of the spinal cord through the roots of spinal nerves. c, central canal; d.f., dorsal fissure; d.r., dorsal root of spinal nerve arising from the dorsal horn of the gray matter (g); gn., ganglion on the dorsal root; n, spinal nerve; v.f., ventral fissure; v.r., ventral root of the spinal nerve, arising from the ventral horn of the gray matter; w., white matter." -Galloway, 1915

Spinal Cord

"Diagram of a cross-section of the spinal cord through the roots of spinal nerves. c, central canal;…

The blue flag or Iris versicolor is an iris with medicinal uses.

Blue Flag

The blue flag or Iris versicolor is an iris with medicinal uses.

The snakehead or Chelone glabra is an herbaceous plant used for medicinal purposes.

Snakehead

The snakehead or Chelone glabra is an herbaceous plant used for medicinal purposes.

The butterfly weed or Asclepias tuberosa is a milkweed plant used for medicinal purposes.

Butterfly Weed

The butterfly weed or Asclepias tuberosa is a milkweed plant used for medicinal purposes.

A patriotic parade of children marching and riding horses.

Parade

A patriotic parade of children marching and riding horses.

A blue jay mocks and laughs at the owl.

Owl and Blue Jay

A blue jay mocks and laughs at the owl.

The caterpillar and chrysalis stages of Pieris rapae, or Small White.

Small White Caterpillar

The caterpillar and chrysalis stages of Pieris rapae, or Small White.

The butterfly of Pieris rapae, or Small White.

Small White Butterfly

The butterfly of Pieris rapae, or Small White.

"Mytilus edulis, attached by byssus (By) to a piece of wood. F, foot; S, exhalant siphon." -Parker, 1900

Blue Mussel

"Mytilus edulis, attached by byssus (By) to a piece of wood. F, foot; S, exhalant siphon." -Parker,…

Of the Heath family (Ericaceae), the white swamp honeysuckle (Rhododendron viscosum).

White Swamp Honeysuckle

Of the Heath family (Ericaceae), the white swamp honeysuckle (Rhododendron viscosum).

Of the Phlox family (Polemoniaceae), the wild blue phlox (Phlox divaricata).

Wild Blue Phlox

Of the Phlox family (Polemoniaceae), the wild blue phlox (Phlox divaricata).

Of the Vervain family (Verbenaceae), the white vervain (Verbena urticaefolia).

White Vervain

Of the Vervain family (Verbenaceae), the white vervain (Verbena urticaefolia).

Of the Vervain family (Verbenaceae), the blue vervain (Verbena hastata).

Blue Vervain

Of the Vervain family (Verbenaceae), the blue vervain (Verbena hastata).

Of the Mint family (Labiatae), the blue curls (Trichostema dichotomum).

Blue Curls

Of the Mint family (Labiatae), the blue curls (Trichostema dichotomum).

Of the Figwort family (Scrophulariaceae), the blue toad flax (Linaria Canadensis).

Blue Toad Flax

Of the Figwort family (Scrophulariaceae), the blue toad flax (Linaria Canadensis).

Of the Composite family (Compositae): left, white snakeroot (Eupatorium urticaefolium); right, boneset (Eupatorium perfoliatum).

White Snakeroot and Boneset

Of the Composite family (Compositae): left, white snakeroot (Eupatorium urticaefolium); right, boneset…

Of the Composite family (Compositae), the blue-stemmed golden-rod (Solidago caesia).

Blue-Stemmed Golden-Rod

Of the Composite family (Compositae), the blue-stemmed golden-rod (Solidago caesia).

Of the bead lily family (Clintonia), the white clintonia (Clintonia umbellulata).

White Clintonia

Of the bead lily family (Clintonia), the white clintonia (Clintonia umbellulata).

Of the dayflower family (Commelina), the slender dayflower (Commelina erecta).

Slender Dayflower

Of the dayflower family (Commelina), the slender dayflower (Commelina erecta).

Of the mud plantain family (Heteranthera), the blue mud plantain (Heteranthera limosa).

Blue Mud Plantain

Of the mud plantain family (Heteranthera), the blue mud plantain (Heteranthera limosa).

Of the composite family (Compositae), the small white aster (Aster vimineus).

Small White Aster

Of the composite family (Compositae), the small white aster (Aster vimineus).

"White whelk (Buccinum undatum)." -Taylor, 1904

White Whelk

"White whelk (Buccinum undatum)." -Taylor, 1904

"Lengthwise section of grain of corn. y, yellow, oily part of endosperm; w, white, starchy part of endosperm; p, plumule; s, the shield (cotyledon), in contact with the endosperm for absorption of food from it; r, the primary root." -Bergen, 1896

Corn Grain

"Lengthwise section of grain of corn. y, yellow, oily part of endosperm; w, white, starchy part of endosperm;…

"White water-lily. The inner petals and the stamens growing from the ovary." -Bergen, 1896

White Waterlily

"White water-lily. The inner petals and the stamens growing from the ovary." -Bergen, 1896

"Transition from petals to stamens in white water-lily. E, F, G, H, various steps between petal and stamen." -Bergen, 1896

Petals to Stamens

"Transition from petals to stamens in white water-lily. E, F, G, H, various steps between petal and…

"The American Blue Jay is a beautiful bird that is common near all sections of the United States, from the Gulf of Mexico to Canada."

American Blue Jay

"The American Blue Jay is a beautiful bird that is common near all sections of the United States, from…

In heraldry, an ordinary in the form of St. Andrew's cross, formed by two bends, dexter and sinister, crossing each other.

Saltire Flag

In heraldry, an ordinary in the form of St. Andrew's cross, formed by two bends, dexter and sinister,…

Muscles on the front of the arm. Note the white cords, the tendons at the wrist.

Muscles of the Arm

Muscles on the front of the arm. Note the white cords, the tendons at the wrist.

A transverse section of the neck. The separate muscles as they are arranged in layers, with their investing fascia. The figures in white space represent fascia (sheath); other figures are muscles. Labels: 12, trachea; 13, esophagus, 14, carotid artery and jugular vein; 28, one of the bones of the spinal column.

The Transverse Section of the Neck

A transverse section of the neck. The separate muscles as they are arranged in layers, with their investing…

By pricking the end of the finger with a needle, we can obtain a drop of blood for examination. Place it on the slide, cover with a glass, and put it under a microscope. The red disks will be seen to group themselves in rows, while the white disk will seem to draw apart, and to be constantly changing their form. After gradual evaporation, the crystals may be seen.

Blood Crystals

By pricking the end of the finger with a needle, we can obtain a drop of blood for examination. Place…

A spinal nerve. Labels: P, posterior root of a spinal nerve; G, ganglion; A, anterior root; S, spinal nerve. The white portion of the figure represents the white fibers; and the dark, the gray.

Spinal Nerve

A spinal nerve. Labels: P, posterior root of a spinal nerve; G, ganglion; A, anterior root; S, spinal…

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…

Mature white fibrous tissue of tendon, consisting mainly of fibers with a few scattered fusiform cells.

White Fibrous Tissue of the Tendon

Mature white fibrous tissue of tendon, consisting mainly of fibers with a few scattered fusiform cells.

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…

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.

Gray, pale, or gelatinous nerve fibers. A. From a branch of olfactory nerve of the sheep: two dark bordered or white fibers from the fifth pair are associated with the pale olfactory fibers. B. From the sympathetic nerve.

Gelatinous Nerve Fibers

Gray, pale, or gelatinous nerve fibers. A. From a branch of olfactory nerve of the sheep: two dark bordered…

Several fibers of a bundle of medullated nerve fibers acted upon by silver nitrate to show peculiar behavior of nodes of Ranvier, N, towards this reagent. The silver has penetrated at the nodes, and has stained the axis cylinder, M, for a short distance. S, the white substance.

Behavior of the Nodes of Ranvier

Several fibers of a bundle of medullated nerve fibers acted upon by silver nitrate to show peculiar…

The illustration exhibits the typical characters of the red blood cells in the main divisions of Vertbrata. The fractions are those of an inch, and represent the average diameter. In the case of the oval cells, only the long diameter is here given. It is remarkable, that although the size of the red blood cells varies so much in the different classes of the vertebrate kingdom, that of the white corpuscles remains comparatively uniform, and thus are, in some animals, much greater, in others much less than the red corpuscles existing side by side with them.

Red Blood Cells in Vertebrata

The illustration exhibits the typical characters of the red blood cells in the main divisions of Vertbrata.…

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

Macrophages

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

Section of gray matter of anterior cornu of a calf's spinal cord; a, nerve fibers of white matter in transverse section, showing axis cylinder in the center of each; r, large stellate nerve cells with nuclei and three prolongations.

Gray Matter of Spinal Cord

Section of gray matter of anterior cornu of a calf's spinal cord; a, nerve fibers of white matter in…

Section of a spinal cord, one half of which shows the tracts of the white matter, and the other half (right) shows the position of the nerve cells in the gray matter. 7, 10, 9, and 3 are tracts of descending degeneration, 1, 4, 6, and 8, of the ascending degeneration.

Section of the Spinal Cord

Section of a spinal cord, one half of which shows the tracts of the white matter, and the other half…

The cerebellum in section and fourth ventricle, with the neighboring parts. Labels: 1, median groove of fourth ventricle, ending below in the calamus scriptorius, with the longitudinal eminence formed by the fasciculi teretes, one on each side; 2, the same groove, at the place where the white streaks of th auditory nerve emerge from it to cross the floor of the ventricle; 3, in inferior crus or peduncle of the cerebellum, formed by the restiform body; 4, posterior pyramid; above this is the calamus scriptorius; 5, superior crus of cerebellum, or processus e cerebello ad cerebrum( or ad testes); 6, fillet to the side of the crura cerebri; 7, lateral grooves of the crura cerebri; 8, corpora quadrigemina.

The Cerebrum and Fourth Ventricle of the Brain

The cerebellum in section and fourth ventricle, with the neighboring parts. Labels: 1, median groove…

Outline sketch of a section of the cerebellum, showing the corpus dentatum. The section has been carried through the left lateral part of the pons, so as to divide the superior peduncle and pass nearly through the middle of the left cerebellar hemisphere. The olivary body has also been divided longitudinally so as to expose in section its corpus dentatum. c r, crus cerebri; f, fillet; q, corpora quadrigemina; s p, superior peduncle of the cerebellum divided; m p, middle peduncle or lateral part of the pons Varolii, with fibers passing from it into the white stem; a v, continuation of the white stem radiating towards the arbor vitae of the folia; c d, corpus dentatum; o, olivary body with its corpus dentatum; p, anterior pyramid.

The Cerebellum of the Brain

Outline sketch of a section of the cerebellum, showing the corpus dentatum. The section has been carried…

Vertical section of dog's cerebellum. Labels: p m, pia mater; p, corpuscles of Purkinje, which are branched nerve cells lying in a single layer and sending single processed downwards and more numerous ones upwards, which branch continuously and extend through the deep "molecular layer" towards the free surface; g, dense layer of ganglionic corpuscles., closely resembling nuclear layers of retina; f, layer of nerve fibers, with a few scattered ganglionic corpuscles. This last layer (f) constitutes part of the white matter of the cerebellum, while the layer between it and the free surface are gray matter.

Cerebellum of Dog's Brain

Vertical section of dog's cerebellum. Labels: p m, pia mater; p, corpuscles of Purkinje, which are branched…

The nightshade or bittersweet (Solanum Dulcamara).

Nightshade

The nightshade or bittersweet (Solanum Dulcamara).

"The familiar cockles are among the most widely distributed of shells. A species common to the Atlantic coast. It's white or fawn-colored shell being hollowed out into twenty-six furrows, forming so many corrugated ripples on the side. It is considered good for food."

Cardium Edulis (Linnaeus)

"The familiar cockles are among the most widely distributed of shells. A species common to the Atlantic…

"The familiar cockles are among the most widely distributed of shells. An exotic species which inhabits the coast of Guinea and Senegal, the shell of which, white and fragile, is much sought after by collectors."

Cardium Costatum (Linnaeus)

"The familiar cockles are among the most widely distributed of shells. An exotic species which inhabits…

Vertical section of area pellucida and area opaca (left extremity of figure) of blastoderm of a fresh laid egg (unincubated). Labels: S, superficial layer corresponding to epiblast; D, deeper layer, corresponding to hypoblast; and probably in part to mesoblast; M, large "formative cells," filled with yolk granules, and lying on the floor of the segmentation cavity; A, the white yolk immediately underlying the segmentation cavity.

Blastoderm of an Egg

Vertical section of area pellucida and area opaca (left extremity of figure) of blastoderm of a fresh…