Skin Flashcards
Back and Thorax (25 cards)
What are the 7 functions of the skin?
protection
water resistance
sensation
heat regulation
control evaporation
storage/synthesis
absorption
What are the two important layers of the skin?
epidermis, dermis
What kind of epithelium makes up the epidermis?
stratified squamous
What layer of the skin consists of the connective tissue?
dermis
How are the dermis and epidermis connected?
basement membrane
What are mechanoreceptors?
nerve endings
What is the papillary dermis?
thin, superficial area of the dermis adjacent to the epidermis
What is the reticular dermis?
deep thicker area below the papillary dermis
What are the 5 sublayers of the epidermis (in order, if present)?
stratum corneum
stratum lucidum
stratum granulosum
stratum spinosum
stratum basale
What layer of the epidermis consists of keratinized cells with no nucleus or cytoplasm?
stratum corneum
What layer of the epidermis is only present in thick skin (soles of feet, palms)
stratum lucidum
What layer of the epidermis is only two to four layers thick of flattened cells?
stratum granulosum
What kind of granules are found in the stratum granulosum?
keratohaylin granules
What is the main part of the epidermis called?
stratum spinosum
What kinds of cells are found in the stratum spinosum?
keratinocytes
What is the deepest layer of the epidermis?
stratum basale
What kinds of cells are in the stratum basale?
melanocytes
What are keratinocytes?
synthesize keratin the stratum spinosum
What are melanocytes?
synthesize melanin in the stratum basale
Where are the Laugerhans cells located?
stratum spinosum
What kinds of granules are in Langerhans cells?
Birbeck granules
What are the three phases of wound repair?
inflammatory phase
proliferation phase
remodeling phase
What happens in the inflammatory phase of wound repair?
blood clots form to obtain homeostasis
What happens in the proliferation phase of wound repair?
new cells are formed (angiogenesis), collagen deposition, wound decreases in size
