Chp 5 Accessory Structures/Inflammation Flashcards
Accessories of skin include?
hair, nails, glands
accessories of skin all derived from ____
epidermis
What is each hair composed of?
columns of dead, keratinized cells bounded with proteins
Hair consists of ____ and ____
shaft, root
Shaft is?
superficial portion
Root is?
deep portion, penetrates into dermis sometimes
what 3 concentric layers does hair consist?
- Inner Medulla
- Middle Cortex
- Outer Cuticle
Inner Medulla
flexible soft keratin, thin hair
Middle cortex contains?
thick layers hard keratin, hair colour
Outer cuticle is?
single layer of flat keratinized cells, thin
root of each hair is surrounded by _____ and has ____ at base
hair follicle, bulb
What does each hair follicle go through?
growth cycle
Growth cycle consists of ____ and ____, end of growth cycle called?
growing stage 2-5 years, resting stage 3 months, club cycle
Arrector Pili Muscle
bundle smooth muscle cells associated with bulb
Goose Bumps muscles contract pull _____ hair into perpendicular poison to skin surface
arrector pili, perpendicular, shaft
Nails
plates tightly packed, hard, keratinized epidermal cells
Nail Root
proximal portion buried in fold of skin
What do exocrine glands do?
secrete products on outer surface of body
What are 6 skin glands?
Sebaceous Glands Sudoriferous Glands Eccrine Sweat Glands Apocrine Sweat Glands Ceruminous Glands Mammary Glands
Sebaceous Glands secrete?
sebum mixture fat, cholesterol, proteins, salts, pheromones
What is sebum?
provides lubrication stops bacteria
Sebaceous glands secrete ____ directly into _____ or directly onto _____ surface
sebum, hair follicles, skin
Acne is?
bacterial inflammation of sebaceous glands
Sudoriferous Glands include?
what shape are these glands?
Eccrine Sweat Glands, Apocrine Sweat Glands
tubular
Eccrine Sweat glands secrete?
where do they secrete?
watery sweat some solutes
skin surface