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NAU A&P, 6

NAU Integumentary System

QuestionAnswer
Protection, consists of skin, nails, hair, sweat and oil glands. Integumentary System
Three Layers of Skin Epidermis, Dermis, Hypodermis or Subdermis
Made up of stratified squamous epithelial cells, is avascular and innovated. Epidermis
Many nerve endings for touch. Innovated
Separates the epithelial tissue from the connective tissue. Basement membrane
Five layers of the epidermis bottom to the top. Stratum Basale, Stratum Spinosum, Stratum Granulosum, Stratum Lucidum, Stratum Corneum
Basal Cell Layer, deepest layer. Stratum Basale
Many layers of spiny shaped cells with centrally located, large, oval nuclei and developing fibers of keratin; cells becoming flattened. Beneath the stratum granulosum. Stratum Spinosum
3-4 layers of flattened granular cells that contain shrunken fibers of keratin and shriveled nuclei. Beneath the stratum lucidum. Stratum Granulosum
Cells appear clear; nuclei, organelles and cell membranes are no longer visible. Between stratum corneum and stratum granulosum on soles and palms. Stratum Lucidum
Many layers of keratinized, dead epithelial cells that are flattened and nonnucleated. Outermost layer. Is waterproof. Stratum Corneum
Vascularized, contains nerve endings, reticulum foundational level. When scratched or lacerated will bleed. Contains glands, melanocytes. Tattoo ink is injected at this level. Dermis
Secretes melanin, which gives the skin color. Melanocytes
Finger like projections that stick up into the epidermis. Connects the epidermis to the dermis. Also creates fingerprints. Contains messiner's corpuscles. Dermal papilla
Creates skin pigment, freckles or age spots. Melanin
Receptors which are responsible for touch. Meissner's Corpuscle
Contains sudoriferous, sebaceous, sweat glands, hair follicles, pacinian corpuscles, arrector pili muscles and collagen fibers Reticular Layer
Fibers that loosen over time Collagen Fibers
Muscle that controls hair follicle. Provides protection and heat. Causes goosebumps Arrector Pili Muscle
Receptors which are responsible for pressure Pacinian Corpuscle
Insulating layers, contains adipose and is injection site. Subcutaneous or Hypodermis Layer
Skin accessories Sebaceous glands, Sudoriferous glands, modified sudoriferous glands, hair and nails
Skin Functions Protections against infection, protection against dehydration, regulation of body temperature and collection of sensory information.
Types of Skin Lesions Surface Lesions, Deep Lesions and Burns
Types of sudoriferous glands Eccrine and apocrine glands
Types of modified sudoriferous glands Ceruminous, ciliary glands and mammary glands
Consists of hair Shaft, root and arrector pili muscle
Makes up the nail Nail root, nail bed, nail plate, luna and cuticle
Types of surface lesions Macule, papule, vesicle and pustule
Types of deep lesions Excoriation, laceration, ulcer and fissure
Types of burns First, Second and third degree
Secretes sebum(oil); keeps skin and nails moisturized Sebaceous glands
Sweat glands, secretes odor and sweat Sudoriferous glands
Secretes products directly to the skin Eccrine glands
Secretes product and the apex of cell via the hair follicle Apocrine glands
Secretes earwax Ceruminous glands
Small glands along eyelash line and secrete moisture Ciliary glands
Modified sweat glands, secretes milk Mammary glands
Portion of the hair that sticks above the scalp Shaft
Underneath the scalp, hair with bulb Hair root
Growth underneath the skin Nail root
Overlies the surface of skin, tissue layer under nail plate Nail bed
Hard nail surface provides a protective covering Nail plate
White, half-moon section of the nail Luna
Protects the nail from bacteria Cuticle
What determines skin coloring Genetics, Environmental factors and physiological factors
Not raised, but a flat colored spot. Example: freckles Macule
Firm raised spots on the skin. Example: Warts, moles and skin tags Papule
Clear, raised, fluid filled lesion. Example: blisters Vesicle
Milky, fluid filled sac on the skin. Example: pimple Pustule
Scoring or scratching of the skin Excoriation
Deeper tearing of the skin, creates a ragged edge Laceration
Sore associated with disintegration or death of a tissue Ulcer
Crack or an even split into deep tissue. Example: bad athlete's foot Fissure
Number determines the layer Burns
Just involving the epidermis. Ex: Sunburn First degree burns
Involved the epidermis and the dermis, usually involves blisters Second degree burns
Destruction of the entire skin, leading to scarring Third Degree Burns
Forms when there is a loss of blood Scar
Events of wound healing 1. Injury-blood escapes from dermal tissue 2. Blood clot forms 3. Clot & tissue dry to form protective scab 4. Blood vessels send out alternative branches to revascularize the area 5. Fibroblasts reform new connective tissue 6. Scab falls off
Created by: FKrouse