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This is a diagram illustrating the compound eye of anthropods. A, the whole eye shown in section; B, one of the eye-elements (ommatidium) more highly magnified. c, cuticular facets; ep, epidermis; l, group of celis forming lens-like body; n, optic nerve fibres; o, optic ganglia; p, pigment celis.

Anthropod

This is a diagram illustrating the compound eye of anthropods. A, the whole eye shown in section; B,…

"Epidermis of the garden Balsam, showing stomata st, of an elliptical form." — Encyclopedia Britanica, 1893

Balsam

"Epidermis of the garden Balsam, showing stomata st, of an elliptical form." — Encyclopedia Britanica,…

A section through the epidermis, somewhat diagrammatic, highly magnified. Below is seen a papilla of the dermis, with its artery, f, and veins, gg; a, the horny layer of the epidermis; b, the rete muscosum or Malpighian layer; d, the layer of columnar epidermic cells in immediate contact with the dermis; h, the duct of a sweat gland.

Epidermal Section

A section through the epidermis, somewhat diagrammatic, highly magnified. Below is seen a papilla of…

This illustration shows a stem of a plant. e; epidermis; s, stoma; p, palisade mesophyll; ch, chloroplast; sp, spongy mesophyll; i, intercellular spaces; v, small vein cut across; l, end of vein seen from the side, sonsisting of elongated and banded cells.

Epidermis

This illustration shows a stem of a plant. e; epidermis; s, stoma; p, palisade mesophyll; ch, chloroplast;…

"Vertical section of epidermis, from the lower surface of the leaf of Madder, showing the intimate union of the spidermal cells e, the loose subjacent parenchyma p, with intercellular canals m, and lacuna l; s, stoma." — Encyclopedia Britanica, 1893

Epidermis

"Vertical section of epidermis, from the lower surface of the leaf of Madder, showing the intimate union…

Magnified view of the epidermis, showing mouths of the sweat glands.

Epidermis

Magnified view of the epidermis, showing mouths of the sweat glands.

Vertical section of epidermis of the prepuce. Labels: a, stratum corneum, of very few layers, the stratum lucidum and stratum granulosum not being distinctly represented; b, c, d, and e, the layers f the stratum Malpighi, a certain number of the cells in layers d and e showing signs of segmentation; layers c consists chiefly of prickle or ridge and furrow cells; f, basement membrane; g, cells in cutis vera.

Epidermis

Vertical section of epidermis of the prepuce. Labels: a, stratum corneum, of very few layers, the stratum…

Section of epidermis. Labels: H, horny layer, consisting of s, superficial horny scales; sw, swollen-out horny cells; s.l., clear layer; M, Malpighian layer, consisting of s.gr. granular layer; p, many-sided or prickle cells; c, columnar cells. Nerve fibrils may be traced passing up between the epithelium cells of the Malpighian layer.

Section of Epidermis (Skin)

Section of epidermis. Labels: H, horny layer, consisting of s, superficial horny scales; sw, swollen-out…

Section of skin showing two papillae and deeper layers of epidermis. The papillae contain blood vessels as well as the termination of nerve fibers in the shape of little bodies called tactile corpuscles. The papillae seem chiefly to exist for the purpose of giving the skin its sense of touch. Labels: a, vascular papilla, with capillary loop passing from subjacent vessel, c; b, nerve-papilla, containing tactile corpuscle, t; d, nerve passing up to tactile body; f, f, section of spirally winding nerve fibers.

Section of Epidermis (Skin)

Section of skin showing two papillae and deeper layers of epidermis. The papillae contain blood vessels…

A section through the epidermis, highly magnified. Labels: Below is seen a papilla of the dermis, with its artery, f, and veins, g g; a, the horny layer of the epidermis; b, the rete mucosum or Malpighian layer; d, the layer of columnar epidermic cells in immediate contact with the dermis; h, the duct of a sweat gland.

Epidermis and Sweat Gland

A section through the epidermis, highly magnified. Labels: Below is seen a papilla of the dermis, with…

Section of the epidermis.

Section of the Epidermis

Section of the epidermis.

Vertical section of epidermis and papillae of corium.

Vertical Section of Epidermis

Vertical section of epidermis and papillae of corium.

A section across the forearm a short distance below the elbow-joint. R and U, its two supporting bones, the radius and ulna; e, the epidermis, and d, the dermis of the skin; the latter is continuous below with bands of connective tissue, s, which penetrate between and invest the muscles, which are indicated by numbers; n, n, nerves and vessels.

Forearm, Section of

A section across the forearm a short distance below the elbow-joint. R and U, its two supporting bones,…

This illustration shows the longitudinal section of the tip of a growing stem: e, epidermis extending over surface of the entire tip; a, formative region; b, upper portion of the zone of elongation; c, cortex; x, cells of the central region that by further growth form the vascular bundles; l, first appearance of the leaves.

Growing Stem

This illustration shows the longitudinal section of the tip of a growing stem: e, epidermis extending…

"Formation of stomata from leaf of Hyacinth, seen from the surface. e, epidermis cells; s', mother-cell of stomatic guard-cells; s, bipartition of mother-cell into two guard-cells." — Encyclopedia Britanica, 1893

Hyacinth

"Formation of stomata from leaf of Hyacinth, seen from the surface. e, epidermis cells; s', mother-cell…

This illustration shows stages in the germination of the gametospore of Lepidium, sectional view: A, micropylar end of embryo sac, showing the enlarging gametospore provided with cell wall and attached to wall of sac. B, later growth-s, suspensor; e, embryo cell; en, endosperm cells. C, pro-embryo after first division of embryo cell. D, further divisions of embryo cell, showing formation of an epidermis and a central stem region. E, later growth, two growing regions, the cotyledons, appearing on the sides of the stem. F, plant or embryo, consisting of two cotyledons, c; stem, st, which terminates in the root, r; the endosperm cells, en, are ebing absorbed by the enlarging embryo; s, suspensor.

Lepidium

This illustration shows stages in the germination of the gametospore of Lepidium, sectional view: A,…

This is a diagram of the skin of mammals, showing the multiple layered condition, together with outgrowths and ingrowths. E, epidermis; D, dermis; a, adipose tissue, -fat deposited amid the connective tissue; b, blood vessels; c.e., columnar epithelial layer of the epidermis; f, hair follicle; g, hair; n, nerve; n.e., nerve ending; p, pore of sweat gland; seb., sebaceous or oil gland of hair; s.g., sweat gland; s.c., horny layer of epidermis; s.m., mucous layer of epidermis.

Mammal Skin

This is a diagram of the skin of mammals, showing the multiple layered condition, together with outgrowths…

"Pitcher of Nepenthes distillatoria. A, honey-gland from attractive surface of lid; B, digestive gland from interior of pitcher, in pocket-like depression of epidermis, opening downwards; C, transverse section of the same. A, B, and C magnified about 100 diameters." — The Encyclopedia Britannica, 1893

Nepenthes

"Pitcher of Nepenthes distillatoria. A, honey-gland from attractive surface of lid; B, digestive gland…

A magnified slice through the skin to show nerve endings, m, e, and a.

Nerve Endings in the Skin

A magnified slice through the skin to show nerve endings, m, e, and a.

This image shows the cross-section of the outer cells of a leaf of pine. S, stoma; E, epidermis; C, cuticle; ST, stereome; and M, Mesophyll Cells.

Pine Leaf

This image shows the cross-section of the outer cells of a leaf of pine. S, stoma; E, epidermis; C,…

"Epidermis of leaf of Saxifraga Sarmentosa, showing clusters of stomata s, surrounded by large epidermal cells e. The cells among which the stomata occus are very small." — Encyclopedia Britanica, 1893

Saxifraga Sarmentosa

"Epidermis of leaf of Saxifraga Sarmentosa, showing clusters of stomata s, surrounded by large epidermal…

Section of scalp, showing longitudinally cut hair follicles.

Scalp Showing Hair Follicles

Section of scalp, showing longitudinally cut hair follicles.

A magnified block of the skin. Labels: a, dead part; d, live part of the epidermis; e, sweat glands; n, nerve endings.

Magnified Image of the Skin

A magnified block of the skin. Labels: a, dead part; d, live part of the epidermis; e, sweat glands;…

A section through the skin and subcutaneous areolar tissue. Labels: h, horny stratum, and m, deeper more opaque layer of the epidermis; d, dermis passing below into sc, loose areolar tissue, with fat, f, in its meshes; above, dermic papillae are seen, projecting into the epidermis which is molded on them; a, opening of a sweat gland; gl, the gland itself.

Section of the Skin and Subcutaneous Areolar Tissue

A section through the skin and subcutaneous areolar tissue. Labels: h, horny stratum, and m, deeper…

Section of the skin showing the hairs and sebaceous glands. The sebaceous glands are small saccular glands, the ducts of which open into the hair follicles. They are lined with epithelium and secrete a fatty, oily substance which they discharge into the hair follicles to lubricate the hairs and make them glossy. It also exudes over the surface of the skin to keep it soft and flexible. Labels: a, the epidermis; b, corium; c, muscles, attached to hair follicles and to under surface of epidermis.

Section of Skin Showing Hairs and Sebaceous Glands

Section of the skin showing the hairs and sebaceous glands. The sebaceous glands are small saccular…

Section of skin, showing its chief layers-epidermis, corium and tela subcutanea.

Section of Skin Showing Chief Layers

Section of skin, showing its chief layers-epidermis, corium and tela subcutanea.

The layers of the skin, which consists of the epidermis or cuticle, the scarf-skin, composed of 3 superficial and 2 deep layers; and the Derma, Corium, or Cutis vera, the true skin, composed of a papillary layer above and a reticular layer below.

Layers of the Skin

The layers of the skin, which consists of the epidermis or cuticle, the scarf-skin, composed of 3 superficial…

"A Layer of the Outer Skin from the Palm of the Hand. Detached by maceration." — Blaisedell, 1904

Outer skin

"A Layer of the Outer Skin from the Palm of the Hand. Detached by maceration." — Blaisedell, 1904

"A block out of the skin. a, dead part and d live part of the epidermis; e, sweat glands; n, nerve endings." —Davison, 1910

Section of skin

"A block out of the skin. a, dead part and d live part of the epidermis; e, sweat glands; n, nerve endings."…

Section of the skin, showing the hair follicles, sebaceous glands, and the muscles of the hair. Labels: a, epidermis; b, dermis; c, muscles of the hair follicles; d, sebaceous glands.

Section of the Skin

Section of the skin, showing the hair follicles, sebaceous glands, and the muscles of the hair. Labels:…

A thin slice through the skin. Labels: a, dead part; d, live part of the epidermis; ar, artery; e, sweat glands; n, nerves.

Section of the Skin

A thin slice through the skin. Labels: a, dead part; d, live part of the epidermis; ar, artery; e, sweat…

Vertical section through the skin of the trunk in the region of the arch of the ribs. One of the small hairs is seen in longitudinal section.

Section of the Skin

Vertical section through the skin of the trunk in the region of the arch of the ribs. One of the small…

Diagram to show the structure of the Skin. Labels: E.c, epidermis, corneous part; E.m, epidermis, Malpighian part; D.c, connective tissue of dermis; p, papilla; gl, sweat gland, the coils of the tube cut across or lengthwise; d, its duct; f, fat; v, blood vessels; n, nerve; t.c, tactile corpuscle.

Structure of the Skin

Diagram to show the structure of the Skin. Labels: E.c, epidermis, corneous part; E.m, epidermis, Malpighian…

Vertical section of the skin, showing sebaceous glands, sweat-glands, hair, and follicle, also arrector muscle.

Vertical Section of the Skin

Vertical section of the skin, showing sebaceous glands, sweat-glands, hair, and follicle, also arrector…

Vertical section of the skin.

Vertical Section of the Skin

Vertical section of the skin.