test 3 Flashcards
what are the 4 types of epidermis cells
- keratinocytes
- melanocytes
- dendric (Langerhans) cells
- tactile (Merkle) cells
what do keratinocytes do
produce keratin
what do melanocytes do
produce melanin
what do dendric (Langerhans) cells do
activate the immune systems
what do tactile (Merkle) cells do
activate touch receptors
name the 5 layers of the epidermis from most superficial to deepest
1: Stratum Corneum
2: Stratum Lucidum
3: Stratum Granulosum
4: Stratum Spinosum
5: Stratum Basale
what’s the stratum Basale layer of the epidermis responsible for
cell division and replacement
whats the stratum spinosum layer responsible for
- several layers thick
- contain weblike systems of pre-keratin filaments attached to desmosomes
whats the stratum granulosum layer
and thin layer made of 1-5 layers of flat cells
whats the stratum lucidium layer
found only on parts with thick skin
whats the stratum corneum layer
keratinaized dead cells to protect deeper layers form abrasion and prevent water loss
what are the layers of the skin in order
epidermis, dermis, hypodermis
what does the dermis contain
- Nerves
- Blood vessles
- lymph vessles
- hair follicles
- oil glands
- sweat glands
what layers make the dermis
- Papillary layer
- Reticular Layer
what is the Papilary dermis layer
areolar connective tissue
what is the reticular dermis layer
dense irregular connective tissue
what is keratin
a protein that gives skin connective properties
the epidermis is vascular. True or False
False. It is avascular
the dermis is vascular. true or false
TRUE
what is the hypodermis layer
the depest layer that contains superficial fascia
what is secreted by the sebatious glands
sebum
what is secreted by the eccrine sweat glands
sweat
what are the 2 types of sweat glands
- Eccrine (merocrine)
- Apocrine
where are apocrine sweat glands
axillary and anogenital area
