6 Integument (Lecture) Flashcards
Functions of the integument
Protective layer, maintain body temperature, store and synthesize nutrients, Sensory reception, and Secretion and Excreation
The skin converts
cholesterol to vitamin D
The skin secretes
useful substances
The skin excretes
waste
which layer of the integument is made of stratified squamous epithelim
epidermis
Which layer of the integument is an avascular barrier that regenerates
epidermis
Epidermal cells die because
they are avascular and cant get O2
What are the 5 layers of the epidermis
Stratum corneum, Stratum lucidum, Stratum granulosum, Stratum spinosum, and Stratum basale
Which layer of the epidermis is sometimes thick or thin and all of its cells are dead
Stratum corneum
Which layer of the epidermis is only found on the hands and feet
Stratum lucidum
XXX In which layer do Epithelial cells begin to die. Organelles die and form dark spots. contain soft (water proofing) and hard keratin (fingernails).
Stratum granulosom
XXX In this layer cells are living but stop reproducing
Stratum spinosum
XXX Bottom layer (stem cells here)
Stratum basale
Basement membrane does what
connects basal to dermis
XXX What type of cell is a dying epithelial cell
keratinocytes
Pigment cells that protect the living cells from UV radiation
Melanocytes
What type of WBC alarms the immune system?
Dendritic Cells
Inhibit dendritic cells (why my hands itch)
Granstein cells
Parts of the epidermis that project down toward dermis
Epidermal ridges
Epidermal or Friction fidges
finger prints
What layer of the integument do you never shed
dermis
What strengthens the dermis
collagen
Zipper for epidermis to dermis mounds in the dermis that project up.
Dermal papillae
What are the 2 layers of the dermis
Papillary and Reticular
blood vesssels mark the boarder of the
Papillary and Reticular
XXX Reticular layer (cutaneous plexus) is
the boarder between reticular layer and adipose it is made of loose dense connective tissue
- Vasodilatation
brings blood to the skin for cooling
- Vasoconstriction
less blood to the skin core warm
Skin ligaments
bundles of collagen fibers
Deep Fascia
Thin layer of connective tissue between fat and muscle
Oil secreting gland (sebum)
Sebaceous gland
Sudoriferous glands
sweat glands
XXX Temperature regulating gland
Eccrine / merocrine gland
Structure of and eccrine merocrine gland
coil, duct, pore, dermacidin
Coil
base makes sweat come from plasma
Duct
carries sweat to surface
Pore
opening
Dermacidin
chemical that reduces risk of fungal infections
Located in the arm pit and groin (scent glands)
Apocrine sweat gland
Ceruminous
ear wax
lacrimal
tears
Salivary
spit
mammary
milk
What type of skin contains hair follicles
hirsute skin
XXX What type of skin contains no follicles palms and lips
Glabrous skin
layers of stem cells that produce a hair shaft
hair matrix
opening for blood vessel and nerve at base of hair shaft
Hair papilla
what is the goose bump muscle
arretor pili
XXX Velus hairs
very short almost microscopic hairs never pigmented
Terminal hairs
long thick pigmented hairs
Medulla (hair)
inner most layer of hair shaft
XXX Cortex (hair)
contains pigmented cells and hard keratin
Cuticle (hair)
outter most thick hard keratin. When this wears away you have split ends
purpose of fingernails
protect delicate bones of the fingers
nail root contains
stem cells
where is the nail bed
under the nail
XXX nail bed is comprised of
lower layers of epidermis
Lunula
moon nail root visable
which burn is least severe
1st degree
which burn involves only epidermis and superficial epidermis
1st degree
XXX which burn involves blister epidermis coming off. Epidermis and significat portion of dermis
2nd degree
which type of burn involves split thickness skin grafts damaging all of epidermis and dermis
3rd degree
