Anatomy of the Skin

Fig. 1.

Vertical section of the skin—Diagrammatic. (After Heitsmann.)

The Epidermis.

Fig. 2.

c, corneous (horny) layer; g, granular layer; m, mucous layer (rete Malpighii).
The stratum lucidum is the layer just above the granular layer.
Nerve terminations—n, afferent nerve; b, terminal nerve bulbs; l, cell of Langerhans.

(After Ranvier.)

The Blood-vessels.

Fig. 3.

C, epidermis; D, corium; P, papillæ; S, sweat-gland duct.
v, arterial and venous capillaries (superficial, or papillary plexus) of the papillæ.
Deep plexus is partly shown at lower margin of the diagram; vs—an intermediate
plexus, an outgrowth from the deep plexus, supplying sweat-glands, and
giving a loop to hair papilla.

(After Ranvier).

The Nervous and Vascular Papillæ.

Fig. 4.

a, a vascular papilla; b, a nervous papilla; c, a blood-vessel; d, a nerve fibre;
e, a tactile corpuscle.

(After Biesiadecki.)

The Hair and Hair-Follicle.

Fig. 5.

A, shaft of the hair; B, root of the hair; C, cuticle of the hair; D, medullary substance of the hair.

E, external layer of the hair-follicle; F, middle layer of the hair-follicle; G, internal layer of the hair-follicle; H, papilla of the hair; I, external root-sheath; J, outer layer of the internal root-sheath; K, internal layer of the internal root-sheath.

(After Duhring.)