Chapter 18

Front 1

Anagen

Back 1

First stage of hait growth during which new hair is produced.

Front 2

Catagen

Back 2

Second transition stage of hair growth; in the catagen stage, the hair shaft grows upward and detaches itself from the bulb.

Front 3

Depilation

Back 3

Process of removing hair at skin level.

Front 4

Depilatory

Back 4

Substance, usually a caustic alkali preparation, used for temporarily removing superfluous hair by dissolving it at skin level.

Front 5

Electrolysis

Back 5

Removal of hair by means of an electric current that destroys the hair root.

Front 6

Epilation

Back 6

Removes hairs from the follicles; waxing or tweezing.

Front 7

Hair bulb

Back 7

Swelling at the base of the follicle that provides the hair with nourishment; it is a thick, club-shaped structure that forms the lower part of the hair root.

Front 8

Hair follicle

Back 8

Mass of epidermal cells forming a small tube, or canal; the tube-like depression or pocket in the skin or scalp that contains the hair root.

Front 9

Hair papilla (plural: papillae)

Back 9

Cone-shaped elevations at the base of the follicle that fit into the hair bulb. The papillae are filled with tissue that contains the blood vessels and cells necessary for hair growth and follicle nourishment.

Front 10

Hair root

Back 10

Anchers hair to the skin cells and is part of the hair located at the bottom of the follicle below the surface to the skin; part of the hair that lies within the follicle at its base, where the hair grows

Front 11

Hair shaft

Back 11

Portion of the hair that extands or projects beyond the skin, consisting of the outer layer (cuticle), inner layer (medulla), and middle layer (cortex). Color changes haopen in the cortex.

Front 12

Hirsutism

Back 12

Growth of an unusual amount of hair are parts of the body normally bearing on the downy hair, such as the face, arms and legs of women on the backs of men.

Front 13

Hypertrichosis

Back 13

Also known as hirsuties; condition of abnormal growth of the hair, characterized by the growth of the terminal hair and areas of the body that normally grow only vellus hair.

Front 14

Lanugo

Back 14

The hair on the fetus; soft and downy hair.

Front 15

Laser hair removal

Back 15

Photoepilation a hair reduction treatment in which laser beam is pulsed on the skin using one wavelength at a time, impairing hair growth; an intense pulse of electromagnetic radiation.

Front 16

Photoepulation

Back 16

Also known as intense pulsed light (IPL); Permanent hair removel treatment that uses intense light to destroy the growth cell of the hair follicles.

Front 17

Pilisebaceous unit

Back 17

The hair unit that contains the hair follicle and appendages: the hair root, bulb, dermal papilla, sebaceous appendage, and arrector pili muscle.

Front 18

Sugaring

Back 18

Ancient method of hair removel. The original recipe is a mixture of sugar, lemon juice, and water that is heated to form a syrup, molded into a ball, and pressed onto the skin and then quickly stripped away.

Front 19

Telogen

Back 19

Also known as resting phase; the final phase in the hair cycle that lasts until the fully grown hair shed.

Front 20

Threading

Back 20

Also known as banding; method of hair removal; cotton thread is twisted and rolled along the surface of the skin, entwining hair in the thread and lifting it out of the follicle.

Front 21

Trichology

Back 21

Scientific study of hair and its diseases and care.

Front 22

Vellus hair

Back 22

Also known as lanugo hair; short, fine, unpigmented downy hair that appears on the body, with the exception of the palms of the hands and the soles of the feet.