Lab 11- Integumentary System Flashcards
what are some functions of the integumentary system
protection regulate body temp regulate water loss house sensory receptors
what do u know ab the epidermis
it is keratinized stratified squamous epithelium
it is avascular meaning there is a lack of blood vessels
what do u know ab the hypodermis
it is subcutaneous (under skin) not part of the skin and mostly adipose or fat tissue
main layers of skin
epidermis
dermis
hypodermis / subcutaneous
what are the 5 layers of skin
Stratum corneum
Stratum lucidum
Stratum Granulosum
Stratum spinosum
Stratum basale
20-30 layers of dead cellls with keratin and waterproof
stratum corneum
clear flat dead cells only in thick skin like feet or palms
stratum lucidum
3-5 rows of flat cells (granules of keratin)
stratum granulosum
8-10 rows of cells appear shiny
stratum spinosum
single layer of cuboidal to columnar cells, mitotic, and has melanocytes which provide uv protection
stratum basale
the dermis has two layer:
papillary and reticular
what is an important function of the papillary
wavy and binds epidermis to dermis
creates fingerprints
contains nerve endings
what type of tissue is the papillary made of
areolar connective
what kind of tissue is the reticular made of
dense irregular connective
fun facts ab reticular go!
thick
contains accessory structures
vascular has blood yayyy
what can be classified as dead keratinized epithelial cells
hair and nails ew
the visible part of hair
shaft
hair that is below the portion of skin
root
expanded portion at the base of the root
bulb
involuntary muscle beside each hair follicle makes goosebumps
arrector pili muscle
secrete sebum into hair follicles
sebaceous glands
two types of sweat glands
merocrine(eccrine) and apocrine
found all over body
mostly palms soles of feet forehead
temp control
merocrine
abundant in groin axillary regions
open into hair follicles
become active at puberty
apocrine
