Epidermis Flashcards
5 functions of integumentary system
- protection
- sensation
- temp regulation
- vit D production
- excretion
epidermis tissue type
stratified squamous epithelium
epidermis gets nourishment by?
diffusion
avascular
epidermis is separated from dermis by
basement membrane
most abundant cell of epidermis
kerantinocytes
kerantinocytes
give cell strength by producing keratin
melanocytes
produce melanin to produce color
same number of melanocytes in all people
langerhan cells
cells of immune system
merkle cells
detect light tough and pressure
kerantinzation
as cells move outward to each layer, fill with keratin and die, serve as layer resistant to abrasion and permiable
stratum basale
deepest layer of epidermis–single layer of cuboidal or columnar epithelium
anchored to basement membrane by hemidesmosomes
high mitotic activity and cells become keratinized
spinsosium
daughter cells of basale
limited mitotric vision
contains lamellar bodies, desmosomes and
granulosum
contains keratohylain
in superficial layers, nucleous and organelles degenerate and die
lucidium
thin clear zone found in plams of hands and feet
coreum
most superficial layer; consists of cornified cells