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Flashcards in Hair Deck (37)
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1

  What is a hair follicle?

a sac-like structure which folds down form the epidermis into the dermal layer and from which hair grows

1

What is a peripheral connective tissue sheath?

The outermost wall of a hair follicle, derived from the dermis

1

glassy membrane 

1

external root sheath

3

What is the root?

the portion of hair in which keratinization is still ongoing

3

cuticle

4

melanocytes

5

What is the medulla?

the central core of the hair consisting of large cells and air spaces, absent in fine hair

5

What is terminal hair?

coarse, long hair ( coarse in comparision to vellus hair)

6

hair papilla

7

cortex

9

What is the cuticle?

the outermost layer of a hair which is composed of a single layer of flattened shingle like cells

10

What is the epithelial root sheath?

the innermost portion of the follicle wall, mainly an invagination of the epidermis, has an internal and external layer

11

Which pigment is responsible for red hair?

trichosiderin

12

What is a glassy membrane?

a thickened basal lamina which constitutes the second outermost layer of the follicle wall

13

What is vellus hair?

pale, fine hair 

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follicle wall

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external root sheath

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peripheral connective tissue sheath

17

What is a hair papilla?

a small nipple-like projection of dermal tissue that protrudes into the hair bulb

18

What is a hair shaft?

the portion of hair in which keratinization if complete

19

Where is hair pigment made?

the base of the hair follicle

20

hair matrix

21

What is the cortex?

the bulky layer of flattened cells that that surrounds the medulla

22

medulla

24

What is hair?

flexible strands consisting largely of dead, keratinized cells

24

What is the hair matrix?

the actively dividing area of the hair bulb that produces hair

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glassy membrane

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What are the three concentric layers that make up a hair?

the medulla,the cortex, and the cuticle

29

cuticle