Exam 2 Flashcards
(68 cards)
Stratum Basale (stratum germinativum)
Deepest epidermal layer, firmly attached to the dermis, and melanocytes make up 10-25%
Stratum Spinosum (prickly)
Several layers thick, web-like system, and abundance of melanosomes and dendritic
Stratum Granulosum (Granular Layer)
4-6 cells, cells above this layer die, and cell appearance changes
Stratum Lucidum (Clear Layer)
Only in thick skin and rows of flat, dead keratinocytes
Stratum Corneum (Horny Layer)
20–30 rows of dead, flat, anucleate keratinized membranous sacs, 3/4 of epidermal thickness, and protects cells from environment
What factors determine a person´s skin color?
Heredity and the environment
Which layer of the skin is the hair root found in?
Dermis
Where are cleavage lines found?
Reticular layer of Dermis
What is vitiligo?
depigmentation of patches of skin, happens when melanocytes die or can´t function
First degree burn
epidermal damage only, swelling, and pain
Second degree burn
epidermal and upper dermal damage and blisters appear
Third degree
entire thickness of the skin, nerves are damaged, and skin grafting is necessary
What are the functions of the integumentary system?
protective covering, maintain homeostasis, and synthesis chemicals
What is another name for sweat glands?
sudoriferous glands
Eccrine (merocrine)
numerous amt, found on palms, soles, and foreheads, ducts connect to pores, and thermoregulation
Apocrine Sweat Glands
axillary and anogenital areas, larger than eccrine, and ducts empty into hair follicles
Cyanosis
low oxygen, blue color
Jaundice
liver damage, yellow color
Bruises
Clotted blood beneath skin
Pallor
whitening of the skin, anemia, low blood pressure, fear, anger
Skin grafts
covering the wound with healthy donor skin
What layer of the skin are fingerprints found in?
Dermis: Papillary layer
Fingerprints
friction ridges that enhance grip and opening of sweat gland ducts
What layer of the skin is tattoo ink injected into?
Dermal layer
