Integumentary System Flashcards
The integument covers the entire surface of the body and becomes continuous with the mucous membranes of the ________ at the superficial orifices [opening]
digestive,
respiratory,
and urogenital systems
Skin lines the outer ear canal covers the eardrums and is continuous with the conjunctiva of the eye at the eyelids.
Integumentary system
TWO LAYERS OF INTEGUMENT:
- EPIDERMIS
- DERMIS
TWO LAYERS OF INTEGUMENT:
outer layer
EPIDERMIS
TWO LAYERS OF INTEGUMENT:
stratified squamous keratinized epithelium
EPIDERMIS
TWO LAYERS OF INTEGUMENT:
inner layer
DERMIS
TWO LAYERS OF INTEGUMENT:
overlies [lay on top of] the connective tissue layer
DERMIS
TWO PARTS OF THE INTEGUMENT:
CUTANEOUS MEMBRANES
ACCESSORY STRUCTURES
CUTANEOUS MEMBRANES:
a. Epidermis
b. Dermis
ACCESSORY STRUCTURES:
a. Hair
b. Nails
c. Exocrine Gland [Sweat Gland]
TWO TYPES OF SKIN:
THICK SKIN
THIN SKIN
TWO TYPES OF SKIN:
5 layers
THICK SKIN
TWO TYPES OF SKIN:
4 layers
THIN SKIN
TWO TYPES OF SKIN:
prominent stratum corneum
THICK SKIN
TWO TYPES OF SKIN:
less prominent stratum corneum
THIN SKIN
TWO TYPES OF SKIN:
well developed stratum granulosum
THICK SKIN
TWO TYPES OF SKIN:
less developed stratum granulosum
THIN SKIN
TWO TYPES OF SKIN:
palms of the hands
THICK SKIN
TWO TYPES OF SKIN:
dominant and lines most of the body surface
THIN SKIN
TWO TYPES OF SKIN:
soles of the feet
THICK SKIN
TWO TYPES OF SKIN:
thicker dermis
THIN SKIN
TWO TYPES OF SKIN:
thinner dermis
THICK SKIN
TWO TYPES OF SKIN:
hair and sebaceous glands
THIN SKIN
TWO TYPES OF SKIN:
no hair and sebaceous glands
THICK SKIN
INTEGUMENT FUNCTIONS:
Protective
Synthetic
Sensory
Heat Regulatory
Excretory
Secretory
Water Balance
the first line of defense
PROTECTIVE FUNCTION
protects our body from infection, pathogens, and harmful UV irradiation.
PROTECTIVE FUNCTION
natural vitamin D is synthesized through the Sun’s ultraviolet rays
SYNTHETIC FUNCTION
also manufactures melanin pigment. [melanin helps the skin to regulate the ultraviolet rays coming from the sun]
SYNTHETIC FUNCTION
free nerve endings respond to external stimuli such as touching hot or cold surfaces triggering voluntary or reflex movements or activities.
SENSORY FUNCTION
sweat and cutaneous blood flow will help in the thermoregulation of the body
HEAT REGULATORY FUNCTION
If the body is TOO HOT:
dermal blood vessels _____
DILATE [enlarge]
If the body is TOO HOT:
vessels carry more blood to the surface so heat [excess] ____
CAN escape.
If the body is TOO COLD:
Dermal blood vessels ______
CONSTRICT [narrows/close]
If the body is TOO COLD:
vessels carry less blood to the surface so heat ________
CANNOT escape.
the body excretes EXCESS substances such as that water, salt, fatty substances, and urea
EXCRETORY FUNCTION
removes waste [passive]
Excretion
moves materials [active]
Secretion
sweat help in the thermoregulation of the body.
SECRETORY FUNCTION
sebum makes skin smooth.
SECRETORY FUNCTION
Water balance:
skin serves as a useful means of regulating the water balance of the body by ______ [sweating]
perspiration
Sweat Glands:
sweat = ____
water
sebum = oil/waxy substance
Sebaceous Glands
