What is the name of connective tissue membrane found lining the joint cavities?
synovial membrane
What primary tissues are destroyed when the skin is damaged?
stratified squamous epithelium(epidermis) and the dermis
What types of damage does the skin protect the body from?
chemical, mechanical, bacteria, thermal and UV, dehydration
Where are melanocytes found?
in the stratum basale
Name two different categories of skin secretions and the glands that secrete them
Sebum is an oily secretion produced by the sebaceous glands. whole cells of oil are produced and burst open in the duct of the gland lubricating the hair follicle and arrives at the skin from the follicle Sudoriferous glands(sweat glands) produce sweat th
What controls temperature regulating functions of the skin?
the nervous system
What are arrector pili?
small bands of smooth muscle cells attached to the hair follicle that pull the hair into an upright position when they contract
What are life-threatening consequences of life threatening burns?
metabolism accelerates or may be impaired, changes in immune system and cardiovascular system may falter
Characteristics of first degree burn
epithelial damage only; redness and swelling- skin regenerates well
characteristics of 2nd degree burn
epithelial destruction and some dermal damage. symptoms same as first degree plus blistering
characteristics of 3rd degree burn
epidermal and dermal destruction, skin is blanched or blackened, no pain because nerve endings are destroyed. skin graft is needed
What do serous membranes have and what do they do
have parietal and visceral layers and secrete a lubricating fluid
How many layers is the epidermis divided into and what is the layer where new cells grow?
divided into 4 layers- basal layer is where new cells grow, pushing other cells out to the surface
What causes a blister?
when friction seperates epidermis from the dermis
What is the dermis?
much thicker layer of the skin underneath the epidermis containing blood vessels, nerves and areolar tissue
What is the 3rd and deepest layer of the skin?
hypodermis or subcutaneous layer- where layer of fat for insulation is
What are the 2 types of sweat glands?
eccrine are found all over the body and are activated for cooling purposes and apocrine activated during puberty
What is the top of the dermal layer called?
dermal papillae i.e. fingerprints
what do free nerve endings do
detect chemicals associated with tissue damage and bleeding and registering the feeling of pain
where are meissner's corpuscles found?
upper region of the dermis where they respond to touch
Where are pacinian corpuscles found?
deeper layer of the dermis therefore respond to deeper pressure and vibrations