Exam 2 - Chapter 4 Flashcards
(102 cards)
Integument
the outer layer
functions of the integumentary system
physical protection, thermoregulation, lipid storage, excretion, sensation, immune response, vitamin D regulation, non-verbal communication
the skin is made of ___ layers, the
two layers, the epidermis and dermis
the integumentary system is made up of ___ layers, the
three layers, the epidermis, dermis, and hypodermis
How does the integumentary system help with vitamin d regulation?
exposure to UV rays helps form vitamin D
epidermis
top layer of skin composed of keratinized stratified squamous epithelium tissue
what does it mean for the epidermis to be keratinized
most cells are packed with the protein keratin
what does the protein keratin do in the epidermis?
provides rigidity and toughness
layers of the epidermis
stratum basal, stratum spinosum, stratum granulosum, stratum lucidium, stratum corneum
mnemonic to remember the order of the epidermis layers (outer to inner)
Come Let’s Get Sun Burnt
Thin skin is found
in most places on the body
thin skin does or does not have the stratum lucidium layer?
does not
the thickest layer of thin skin is
stratum spinosum
thick skin is found
on the palms of hands and soles of feet
is the stratum lucidium present in thick skin?
yes
which layer is thickest in thick skin?
stratum corneum
stem cells in the epidermis
divide to give rise to keratinocytes
stem cells are found in what layer of the epidermis?
stratum basale
tactile cells
touch receptors
tactile cells in the epidermis is associated with
nerve fibers from the dermis
tactile cells are found in what layer of the epidermis?
stratum basale
dendritic cell
immune cells
dendritic cells function
alert the body of infection in the integumentary system
dendritic cells are found in what layer of the epidermis?
stratum spinosum and stratum granulosum