ch 18 - vocabulary / terms Flashcards

1
Q

anagen

A

first stage of hair growth during which new hair is produced

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2
Q

catagen

A
  • second transition stage of hair growth
  • the hair shaft grows upward and detaches itself from the bulb
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3
Q

depilation

A

process of removing hair at skin level

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4
Q

depilatory

A

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

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5
Q

electrolysis

A

removal of hair by means of an electric current that destroys the hair root

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6
Q

eplilation

A
  • removes hairs from the follicles
  • waxing or tweezing
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7
Q

hair bulb

A
  • 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
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8
Q

hair follicle

A
  • mass of epidermal cells forming a small tube, or canal
  • tube-like depression or pocket in the skin or scalp that contains the hair root
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9
Q

hair papilla
(plural : papillae)

A
  • cone-shaped elevations at the base fo the follicle that fits into the hair bulb
  • the papillae are filled with tissue that contains the blood vessels and cels necessary for hair growth and follicle nourishment
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10
Q

hair root

A
  • anchors hair to the skin cells and is part of the hair located at the bottom of the follicle below the surface of the skin
  • part of the hair that lies within the follicle at its base, where the hair grows
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11
Q

hair shaft

A
  • portion of the hair that extends or projects beyond the skin, consisting of the outer layer (cuticle), inner layer (medulla), and middle layer (cortex)
  • color changes happen in the cortex
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12
Q

hirsutism

A

growth of an unusual amount of hair on parts of the body normally bearing only downy hair, such as the face, arms, and legs of women or the backs of men

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13
Q

hypertrichosis

A
  • aka. hirsuties
  • condition of abnormal growth of hair, characterized by the growth of terminal hair in areas of the body that normally grow only vellus hair
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14
Q

lanugo

A
  • hair on a fetus
  • soft and downy hair
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15
Q

laser hair removal

A

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

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16
Q

photoepilation

A
  • aka. Intense Pulsed Light (IPL)
  • permanent hair removal treatment that uses intense light to destroy the growth cells of the hair follicles
17
Q

pilosebaceous unit

A

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

18
Q

sugaring

A
  • ancient method of hair removal
  • 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
19
Q

telogen

A
  • aka. resting phase
  • final phase in the hair cycle that lasts until the fully grown hair is shed
20
Q

threading

A
  • aka. 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
21
Q

trichology

A

scientific study of hair and its diseases and care

22
Q

vellus hair

A
  • aka. 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