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Integumentary System
Skin, consisting of the epidermis, dermis and subcutaneous layers
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Layers of the Skin
- Epidermis
- Dermis
- Subcutaneous tissue
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Epidermis
Outermost layer of the skin comprised of dead or dying cells
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Sebum
Fatty secretion of the sebaceous gland that helps keep the skin pliable and waterproof
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Dermis
True skin, also called the corium. Layer of tissue producing the epidermis and housing structures, blood vessels, and nerves associated with the skin.
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Sebaceous Glands
Glands within the dermis secreting sebum
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Sudoriferous Glands
Glands within the dermis that secrete sweat
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Macrophage
Immune system cell that has the ability to recognize and ingest foreign pathogens. Some are housed in the dermis
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Lymphocytes
White blood cell that specializes in humoral immunity and antibody formation. Some are housed in the dermis
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Subcutaneous Tissue
Layer of fatty tissue beneath the dermis
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Lumen
Opening or space within a needle, artery, vein or other hollow vessel
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Layers of Blood Vessels
- Tunica Intima- smooth interior lining
- Tunica Media- muscular component of vessel
- Tinica Adventitia- connective tissue limiting the vessels dilation
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Muscle
Contractile tissue organized in large bundles that provides locomotion and movement for the body
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Tendons
Long, thin, very strong collagen tissues that connect muscle to bone
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Fasciae
Fibrous sheets that bundle skeletal muscle masses together and segregate then from one another
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Tension Lines
Natural patterns in the surface of the skin revealing tensions within
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Types of Closed Wounds
- Contusions
- Hematomas
- Crush injuries
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Contusion
Closed wound in which the skin is unbroken although damage has occured in to the tissue immediately beneath
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Erythema
General reddening of the skin due to dilation of the superficial capillaries
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Ecchymosis
Blue-black discoloration of the skin due to leakage of blood into the tissues
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Hematoma
Collection of blood beneath the skin or trapped within a body compartment
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Crush Injury
Mechanism of injury in which tissue is locally compressed by high-pressure forces
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Crush Syndrome
Systemic disorder of severe metabolic disturbances resulting from the crush of a limb or other body part
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Types of Open Wounds
- Abrasions
- Lacerations
- Incisions
- Punctures
- Impaled objects
- Amputations
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Abrasion
Scraping or abrading away of the superficial layer of the skin. An open soft-tissue injury
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Laceration
An open wound, normally a tear with jagged borders
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Incision
Very smooth or surgical laceration freqently caused by a knife, scalpel, razor blade or glass
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Puncture
Specific soft-tissue injury involving a deep, narrow wound to the skin and underlying organs that carries and increased risk of infection
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Impaled Object
Forein body embedded in a wound
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Avulsion
Forceful tearing away or seperation of body tissue. Partial or complete
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Degloving Injury
Avulsion in which the skin is torn off the underlying muscle, tissue, blood vessels and bone
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Amputation
Severance, removal or detachment either partial or complete, of a body part
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Stages of Wound Healing
- Hemostasis
- Inflammation
- Epithelialization
- Neovascularization
- Collagen synthesis
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Hemostasis
Body's natural ability to stop bleeding, the ability to clot blood
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Inflammation
Complex process of local cellular and biochemical changes as a consequence of injury or infection. Early stage of healing
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Chemotactic Factors
Chemicals released by white blood cells that attract more white blood cells to an area of inflammation
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Granulocytes
White blood cells charged with the purpose of neutralizing foreign bacteria
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Phagocytosis
Process in which a cell surrounds and absorbs a bacterium or other particle
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Epithelialization
Early stage of wound healing in which epithelial cells migrate over the surface of the wound
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Neovascularization
New growth of capillaries in response to healing
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Collagen
Tough, strong protein that comprises most of the body's connective tissue
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Fibroblasts
Specialized cells that form collagen
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Remodeling
Stage in the wound healing process in which collagen is broken down and relaid in an orderly fashion
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Lymphangitis
Inflammation of the lymph channels, usually as a result of a distal infection
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Gas Gangrene
Deep-space infection usually caused by the anaerobic bacterium Clostridium perfringens.
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Serous Fluid
A cellular component of blood similiar to plasma
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Compartment Syndrome
Muscle ischemia that is caused by rising pressures within an anatomical fascial space
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Keloid
A formation resulting from overproduction of scar tissue
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Necrosis
Tissue death, usually from ischemia
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Rhabdomyolysis
Acute pathological process that involves destruction of skeletal muscle
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Types of Bandaging and Dressing Material
- Dressings
- -Sterile/non-sterile
- -Occlusive/non-occlusive
- -Adherent/non-adherent
- -Absorbent/non-absorbent
- -Wet/dry
- Bandages
- -Self-adherent roller
- -Gauze
- -Adhesive
- -Elastic
- -Triangular
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