Quiz 6 Flashcards
(17 cards)
What constitutes and organ
Two tissues
What is the largest organ by weight
Skin
What does the integumentary system include
Skin & accessory structures
What are the two layers of the skin
Epidermis and dermis
What is the epidermis
Outer layer
Stratified squamous
Basement membrane between epidermis& dermis
What is the dermis
Inner layer
Connective tissue
Collagenous &elastic fibers
Subcutaneous layer (hypodermis)
Not considered part of the skin
Insulating layer
Areolar and adipose
Contains blood vessels that supplies skin nutrients
Wha is the epidermis
Stratified squamous
Lack of blood vessels
As cells grow they migrate toward free surface and away from nutrient supply being to flatten and die
What is keratinization
Hardening
Dehydration
And keratin accumulation as they migrate upwards
What is keratin
Tough waterproof protein
What are the 5 layers of the epidermis
Stratum corneum (outermost layer and keratinized cells)
Stratum lucidum (only in thick skin-palms and soles)
Stratum granulossum
Stratum spinossum
Stratum basale (deepest miotic layer)
Function of the epidermis
Protection
What are melanocytes
Stratum basale produce the dark pigment melanin
Absorbs UV light and provides skin color
What factors affect skin color
Hereditary
Environmental
Physiological
What is the dermis
Inner layer of the skin
Contains dermal papillae(fingerprints)
Binds epidermis to underlying tissues
Connective tissue layer
Nerve
Hair
Receptors -lamellated (pressure)
- tactile (light touch)What are the two layers of the dermis
Papillary & reticular
What is the papillary layer
Superficial layer
Areolar
Location of dermal papillae
