Chapter 3: Integumentary System Flashcards
The integumentary system serves four important functions
1- protection
2- regulation
3- sensory
4- secretion
Organs of the integumentary system include
- skin
- hair
- nails
- sebaceous glands
- sweat glands
albin/o
white
cauter/o
to burn
cry/o
cold
cutane/o
skin
derm/o, dermat/o
skin
diaphor/o
profuse sweating
electr/o
electricity
erythr/o
red
hidr/o
sweat
ichthy/o
scaly, dry
kerat/o
hard, horny
leuk/o
white
lip/o
fat
melan/o
black
myc/o
fungus
necr/o
death
onych/o
nail
pedicul/o
lice
phot/o
light
py/o
pus
rhytid/o
wrinkle
sarc/o
flesh
scler/o
hard
seb/o
oil
system/o
system
trich/o
hair
ungu/o
nail
vesic/o
bladder
xer/o
dry
-derma
skin condition
allo-
other, different from usual
xeno-
foreign
What is the largest organ in the body?
the skin
How much does the skin weigh?
20 lbs
The skin is also called what?
- the integument
- the cutaneous membrane
The skin provides constant ______ to the body
protection
The skin forms a ________________
two-way barrier
The skin’s two-way barrier keeps
- pathogens and harmful substances out
- critical body fluids in
- protecting the internal organs and tissues
Sensory receptors are housed in which part of the skin?
the dermis
What do the sensory receptors detect?
- temperature
- pain
- touch
- pressure
Messages from receptors travel to the ________ and __________________
brain and spinal cord
Sebaceous glands produce an oil called _________
sebum
What is the purpose of sebum?
lubricates the skin and keeps it from being too dry
Superficial blood vessels ________ to release heat
dilate
Superficial blood vessels _______ to prevent heat escaping through the skin
constrict
_________________ layer serves as insulation
subcutaneous
The skin consists of 2 layers
1- epidermis
2- dermis
Epidermis
the thin, outer membrane
Dermis
the middle, fibrous connective tissue layer
Subcutaneous layer
fatty tissue beneath the skin
The epidermis is composed of ______________________________
stratified squamous epithelium
The epidermis has no _________ or _______________
blood supply or connective tissue
The ________ layer is the deepest layer of the epidermis
basal
In this layer, cells continuously grow and push old cells toward the surface
the basal layer
Which layer contains melanocytes?
the basal layer
Melanocytes produce the ______________ that gives skin its color
black pigment melanin
Melanin protects skin against _______________
UV rays of the sun
Another name for the dermis
corium
The dermis is _________ tissue with a good ____________
living/blood supply
What is the dermis made up of?
connective tissue and collagen fibers that give it strength
What structures are housed in the dermis?
- hair follicles
- sweat and sebaceous glands
- blood and lymph vessels
- sensory receptors and nerve fibers
- muscle fibers
Another name for the subcutaneous layer
the hypodermis
What is the hypodermis layer composed of?
lipocytes (fat cells)
Purpose of the subcutaneous layer
protects the deeper tissues of the body and acts as insulation against heat and cold
The hair consists of
- the follicle
- root
- shaft
- arrector pili muscle
Nail body
flat plate of keratin that forms most nails
Nail bed
connects nail body to connective tissue underneath
Nail root
base of nail
Cuticle
thin skin-like layer overlapping the base of the nail
Free edge
exposed edge of nail that is trimmed when nails become too long
Lunula
light-colored, half-moon region at the base of the nail
Purpose of sebum
lubricates hair and skin and prevents drying and cracking
Another name for sweat glands
sudoriferous glands
Sweat travels to the surface via a ___________ and exits to the surface via a _______________
sweat duct/sweat pore
Sweat from apocrine glands produces
body odor
angi/o
vessel
bas/o
base
cauter/o
to burn
cortic/o
outer layer
cry/o
cold
diaphor/o
profuse sweating
electr/o
electricity
esthesi/o
feeling
hem/o
blood
myc/o
fungus
onych/o
nail
phot/o
light
septic/o
infection
vesic/o
sac
-al
pertaining to
-emia
blood condition
-ia
state, condition
-iasis
abnormal condition
-ic
pertaining to
-ism
state of
-itis
inflammation
-malacia
abnormal softening
-osis
abnormal condition
-ous
pertaining to
-phagia
eat, swallow
-plasty
surgical repair
-rrhea
discharge
-tic
pertaining to
-tome
instrument to cut
-ule
small