skin Flashcards
components of the integumentary system
skin hair nails sweat and oil glands sensory receptors
1st layer of the skin, made up of 5 layers, the part of the skin that we can touch.
epidermis
sweat glands, pores, hairs all pass throught this layer
epidermis
this layer is a vascular
epidermis
attached to every hair follicle is a _________duct
oil
this duct empties into the hair follicle and makes the hair softer and skin softer
oil duct
what is the name of the muscle that causes a goose bump
erector peli muscle
what is the name of the finger prints
dermal papillae
the area below the epidermis that is thicker and made of CONNECTIVE tissue
dermis layer
the layer that is made of areolar and adipose tissue
subcutaneous layer
list the functions of the skin
regulates body temperature protection detects subcutaneous sensation excretion and absorption synthesis of vitamin D
junction of the epidermis and dermis that senses light touch
miciners corpusles
found at the base of the dermis
pacsinian corpusles
how does the skin regulate body tempurature
through sweat
erector peli muscles
blood vessels constrict
how does the skin protect
it is a barrier to biological pathogens
sweat creates an acid mantle
physical barrier to protect the muscles, bones form drying out (desiccation)
protects us from chemicals
detects cutaneous sensation
excretion and absorption( excretes sweat, absorbs medications
synthesis of sunlight
the epidermis layer produces keratin that serves to water proof
keratinocytes
yellow to black coloration of the skin that protects the nucleus from UV radiation
melanocytes
these cells recognize invading organisms
langerhans cells
found deep in the epidermis
merkel cells
1 cell layer thick only mitotic layer. they have engulfed the melanocytes and merkel cells
stratum basale 1st layer of the epidermis
many layers thick 8-10 layers of keratinocytes
stratum spinosum 2nd layer of the epidermis
flatter more keratinized, 3-5 layers thick
stratum granulosum 3rd layer of the epidermis
only appears in thick hairless areas like palms and soles
stratum lucidum
completely keratonized sloughing off a nucleated replaced by the layers below.
stratum corneum
what feeds and removes waste from the stratum basale area
the dermis
this area lies directly below epidermis and is highly vascular. it contains collagen and elastic fibers
the dermis