The pulp of a hair injected; 1, cut surface of hair; 2, the pulp; 3, injected vessel ramifying in it. On the right the figure shows the hair in its follicle, though the drawing was made from the whisker of a Walrus; 2, the cutis; 3, external sheath of the follicle; 4, internal sheath continuous with the cuticle; 5, pulp; 6, shaft of hair; 7, large nerve going to it.

Hair and its Follicle

The pulp of a hair injected; 1, cut surface of hair; 2, the pulp; 3, injected vessel ramifying in it.…

Transverse section of a hair and hair follicle made below the opening of the sebaceous gland. Labels: a, medulla or pith of the hair; b, fibrous layer or cortex; c, cuticle; d, Huxley's layer; e, Henle's layer of internal root sheath; f and g, layers of external root sheath, outside of g is a light layer, or "glassy membrane" which is equivalent to the basement membrane; h, fibrous coat of hair sac; i, vessels.

Hair Follicle

Transverse section of a hair and hair follicle made below the opening of the sebaceous gland. Labels:…

Longitudinal section of a hair follicle. Labels: a, Stratum of Malpighi, deep layer forming the external root sheath, and continued to the surface of the papilla to form the medullary sheath of the hair; b, second external sheath; c, internal root sheath; d, fibroid sheath of the hair; e, medullary sheath or medulla; f, hair papilla; g, blood vessels of the hair papilla; h, fibro vascular sheath.

Hair Follicle

Longitudinal section of a hair follicle. Labels: a, Stratum of Malpighi, deep layer forming the external…

A moustache hair with its hair follicles in transverse section.

Hair Follicle of a Moustache Hair

A moustache hair with its hair follicles in transverse section.

Transverse section of hair follicle, showing hair surrounded by internal and external root sheaths.

Transverse Section of Hair Follicle

Transverse section of hair follicle, showing hair surrounded by internal and external root sheaths.

Transverse section of hair follicle with contained hair.

Transverse Section of Hair Follicle

Transverse section of hair follicle with contained hair.

A hair. Labels: s, the sac (follicle); P, the papilla, showing the cells and the blood vessels (V).

Hair Papilla

A hair. Labels: s, the sac (follicle); P, the papilla, showing the cells and the blood vessels (V).

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…

Horizontal section of scalp, showing group of transversely cut hair follicles.

Horizontal Section of Scalp

Horizontal section of scalp, showing group of transversely cut hair follicles.