Chapter 5 Flashcards
1
Q
integumentary system
A
consists of skin, hair, nails, and cutaneous
2
Q
what is skin
A
membrane covering external surface of body
-two layers
3
Q
What is the epidermis
A
superficial epithelium
top layer of skin (visible)
4
Q
What is the dermis
A
deeper connective tissue
layer under epidermis
5
Q
structure of skin
A
most 1-2 mm thick
-ranges from .5 mm to 6 mm
6
Q
thick skin
A
epidermis about .5 mm thick
- thick layers of dead cells
- palms, soles, fingers, toes
- sweat glans
- no hair follicles/sebaceous glands
7
Q
thin skin
A
epidermis about .1 mm thick
- rest of body
- hair follicles
8
Q
what does the dermis contain
A
.2 mm- 6 mm
- collagen
- contains elastic and reticular fibers
- contains cells of fibrous connective tissue
- blood vessels, nerve endings
- sweat and sebaceous glans
- hair and nails rooted here
9
Q
hypodermis
A
looser connective tissue, more adipose tissue
- binds skin to muscle and other tissues
- energy reservoir
- provides thermal insulation
- thickness difference between genders
10
Q
melanin
A
produced by melanocytes
- transferred to keratinocytes
- greater quantities produced in darker skin
- more spread out
- degrade more slowly
11
Q
freckles and moles
A
local concentrations of melanin
12
Q
cyanosis
A
“blueness of skin”
oxygen deficiency in blood
13
Q
erythema
A
abnormal redness of skin
14
Q
hematoma
A
bruise, mass of clotted blood
15
Q
pallor
A
temporary pale color
little cutaneous blood flow
