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NAU A&P, 6
NAU Integumentary System
| Question | Answer |
|---|---|
| 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 |