Histology/Skin Structure Flashcards
(41 cards)
name the five layers of the epidermis
corneum lucidum granulosum spinosum basale
what are the two layers of the dermis
reticular and papillary
name the four cells in the epidermis
keratinocytes
melanocytes
langerhans
merkel cells
name the two types of connections used by keratinocytes in the basale
desmosome and hemidesmosome
what are the four layers in thin skin epidermis?
all except the lucidum
what layer of epidermis has melanocytes?
in the stratum basale
what layer of epidermis has langerhans cells?
in the stratum spinosum
how can you pick out langerhans cells on histo?
pale cells in the spinosum layer that have comma like processes
what do langerhans cells have in them?
birbeck granules
what type of cell is a langerhan cells?
dendritic APC cells
what layer are merkel cells in? what is their function?
basale
sensory mechanoreceptors
what do keratinocytes in the stratum spinosum have? what does this lead to?
membrane coating granules that release lipids to help skin be impermeable
what do keratinocytes in the granulosum have? what does it help with?
keratohyaline granules that help bind the keratinocytes together
what two locations have thick skin?p
palms and soles
what type of collagen is in the dermis?
mainly type 1
name the sweat gland types
sebaceous
apocrine
eccrine
what type of structure is a eccrine sweat gland?
simple coiled tubular
name the three cells of eccrine sweat glands
dark
clear
myoepithelial
what do dark cells of eccrine glands release?
mucinogen rich granules
what do clear cells in eccrine sweat glands release?
watery electrolyte rich material
what is function of myoepithelial cells?
to contract and help release of glands
what is role of apocrine sweat gland? where are they located?
large specialized glands..in axilla and perianal regions
what do sebaceous glands secrete?
oily secretion
where are sebaceous glands located?
next to necks of hair follicles and release ther
