Nurs 125 quiz 2 Flashcards
what is the integumentary system made up of?
skin, hair, nails and sebaceous glands
what do the integumentary finding entail about a patient’s health?
hydration, nutrition, emotional status
what is the primary function of the skin?
protection - protects the body from invasion, sensation, thermoregulation, synthesis of vitamin D
what are the 3 layers of the skin?
- Epidermis
- Dermis
- Subcutaneous layer
what is the function & characteristics of the epidermis?
outermost layer - and protects against invasins
contain nerve cells - help with light touch
what are the 5 layers of epidermis?
- stratum germinativum = basal cell layer - forms new skin
2.stratum corneum - new cells migrate here - to be keratinized
what are the types of cells found in the epidermis layer?
- keratinocytes - tough, fibrous protein keratin - protects against friction
- Melanocytes - produce pigment melanin
- Epidermal dendritic (langherns) cells - fight infection - initiate immune response
What is the characteristics of the dermis layer?
- consists mainly of connective tissue or collagen, blood vessles, nerves, sebaceous glands, lymphatic vessel, follicles, sweat glands
- also contains elastic tissue- allows skin to stretch
what is the function of the subcutaneous layer?
- made up of adipose tissue - provides fat storage for energy - also gives skin mobility
what is hair composed of?
keratin - produced by hair follicles located deep in dermis
what are the 2 types of hair?
- Vallus hair - fine, short, hypopigmented and located all over the body
- Terminal hair - darker and coarse - found in scalp, brows, eyelids, axillae, chest
what is the function of arrector pili muslces?
- attched to each follicle - they contact in response to environmental and nervous stimuli causing erection of hair and follicle
what is the function of sebaceous glands?
- they support each follicle - secrete sebum, maintaining hair moisture and condition
what is the structure of nails?
- epidermal appendage - hard plates of keratin on dorsal edges of toes and fingers
what’s the vascular layer of the nail called?
nail bed - vascular epithelial cells - gives the nail pink colour