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Anatomy Test #3

Anatomy Test, Integumentary System

Contains 4-5 layers, produces keratin, lacks blood vessels, composed of stratified squamous epithelium, serves as the outermost protective layer of the skin Epidermis
Thickest layer, contains special sensory receptors, contains irregular, dense connective tissue, contains muscle fibers, hair follicles, glands and many nerves and blood vessels, serves as a reservoir for water and electrolytes Dermis
Another name for the hypodermis, composed of loose connective tissue and insulating adipose tissue, binds the skin to underlying organs, contains the major blood vessels that supply the skin Subcutaneous layer
base cell layer, layer of reproducing cells, another name for stratum germinativum stratum basale
horny layer, most superficial layer, consists of flattened keratinized cells stratum corneum
granular layer, cells begin to die stratum granulosum
clear layer, absent in thin skin stratum lucidum
spiny layer, contains prickle cells stratum spinosum
responds to light touch Meissner's corpuscles
responds to heavy pressure Pacinian corpuscles
body of the nail nail plate
projects from the skin hair shaft
produces heavily keratinized cells hair follicle
portion of hair embedded in the skin hair root
a layer of epithelium under the nail nail bed
part of nail embedded in the skin nail root
moon-shaped white area nearest the root lunula
protrudes into the base of the follicle, provides the nutrients supply hair papilla
hair shaft is flat and ribbon-like shaped kinky
hair shaft is oval wavy
hair shaft is perfectly round straight
pale and fine hair vellus
coarser and longer hair terminal
white nail bed anemia
horizontal furrows malnutrition/illness
nails take on a blue cast cyanotic condition
loosening of the nail from the nail bed onycholysis
axillary and genital areas, located deep in subcutaneous layer apocrine glands
secrete earwax, modified apocrine glands, found in the lining of the external ear canal ceruminous glands
secrete perspiration/sweat, most numerous sweat glands, abundant on the palms of the hands, soles of the feet, forehead, neck and back eccrine glands
secrete breast milk, located in the breast mammary glands
secrete sebum, associated with hair follicles, secreted to help the hair stay soft, pliable and waterproof sebaceous glands
skin secretions and melanin chemical barriers
prevent the entrance and loss of substances physical barriers
immune system helps fight infections and attacks foreign objects biological barriers
heat escapes from all over the body radiation
heat moves to cooler objects conduction
air currents replace warm air with cooler air convection
water leaves the skin in the form of a gas evaporation
baldness alopecia
lack of melanin albinism
pigment-producing cells melanocytes
lowering of the body temperature hypothermia
accumulation of bilirubin in the skin jaundice
patches of de-pigmented white skin vitiligo
persistent friction causes a gross thickening of the epidermis callus
area where blood has escaped and clotted in the tissue spaces bruise
acute trauma that causes a separation of the epidermal and dermal layers blister
a cut below the dermis, suturing helps speed up the healing process deeper cuts
healing is accompanied by the formation of granulations large, open wounds
a cut that only involves the epidermis shallow cuts
dried blood clot and fluids scab
consists mainly of fibrous proteins that forms from plasma, cells, and platelets clot
example is sunburn, superficial partial-thickness first degree burn
deep partial-thickness, blistering normally occurs, burn effects some of the epidermis and some dermis second degree burn
full thickness, destroys the epidermis, dermis and accessory organs, occurs when immersed in hot liquid, fire or corrosive chemicals third degree burn
skin graft, removal of a thin layer of skin from an unburned area and transplant it autograft
leaves extensive scars, burn too extensive, cadaveric skin from a bank is used to cover the injury, temporary covering that decreases the size of the wound and helps prevent infection and helps preserve deeper tissue homograft
Created by: lizzyliz714



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