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Integumentary System (Lecture 3 (Eczema: noncontagious, inflammatory skin…
Integumentary System
Lecture 3
Eczema: noncontagious, inflammatory skin disorder caused by an allergen or irritant
diet,cosmetics,soaps,medication, and emotional stress can cause it
symptoms include dryness, erythema,edema,itching,vesicles,crust and scaling.
treatment-remove the irritant, and apply cortiuosteriods
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Boils: are a rather more deep seated infection of the skin, often caused by staphyloccus. They can cause painful red swellings.
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Hives: (medically known as verticaria) are red, itchy,raisedareas of skin that appear in varying shapes and sizes.
They range is size from a dew mm to several inches in diameter. They can be round, or they can form rings or large patches.
Wheal (welts), red lesions witha red "flare" at the borders, are another manifestation of hives. Hives can occcur anywhere of the body, such as the trunk,arms and legs.
Scabies: lesions on the skin that usually cause intensive itching on the pt. Mites are the primary cause.
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cancer(skin)
Basal cell carcinoma: cancer of the basal cells in the epidermis. slow growing and does not usually spread
Squamous cell carcinoma: thin cells of the epithelium but can spread quicky to other area of the body. Lesions start off small,flat,firm and later scale and crust.
melanoma: cancer of the melanocytes of the epidermis and s the most dangerous type of skin cancer. Lesions can be mulitcolored.
Decubitus Ulcers: also caused by pressure core or bedsore, is caused by prolonged pressure on an area of the body.
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lecture 1
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on an average adult, skin covers more than 3000 square inches of surface area and accounts for about 15% of total body weight
Three layers
epidermis, dermis and subcutaneus (hypodermis)
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Two main types of glands
suldorfarouse glands (sweat glands): are coiled tubes that extend through the dermis and open on the surface of your skin at air pores
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Functions of the skin
protection: uv rays, barrier to pathogens, moisture in to prevent deeper tissues from drying out
sensory perception: respond to pain,pressure,temp., and touch
regulation of body temp.: retain and lose heat, dilation and construction of blood vessels,sweat
storage: fat,glucose, water,vitamins and salts
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excretion: salt,excess water and heat
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skin color-pigmentation
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melanin: a brownish,black pigment produced in the epidermis of the skin by specialized cells called melanocytes
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Lecture 2
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Skin Eruptions
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macules: itchy, elevated areas with an irregular shape (insect bite)
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