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Chapter 5

Integumentary System

Integumentary System skin, hair and nails form
Skin Protection and Excretion are Functions of
Skin Body Temperature Regulation and and Cutaneous Sensation are Functions of
Skin Vitamin D Synthesis and Blood Reservoir and Functions of
Physical, Chemical, Biological 3 Types of Protection
Physical type of protection keeps organisms out
Chemical type of protection kills bacteria with uric acid and prevents Uv damage with melanin
Biological protection that uses langerhans cells
Excretion wastes excrete through sweat
Body Temperature Regulation sweat used for
Cutaneous Sensation Example is sensory receptors that respond to touch and pain
Vitamin D Synthesis From cholestrol absorbs calcium into intestines
Blood Reservoir Holds 5% of bodys blood volume
Skin made up of 2 regions or layers
Epidermis and Dermis Names of the 2 Skin layers
Epidermis thin top layer of skin
Epidermis Layer os skin composed of Stratified Squamous Epithelium
Keratin Most epidermal cells made of
Keratin waterproofing protein
Dermis deepest layer of skin
Dermis layer os skin composed of melanocytes and langerhans cells
Epidermis consists of 5 layers or strata
stratum basale deepest layer of epidermis
stratum spinosum prickly layer of epidermis
stratum granulosum granular layer of epidermis
stratum lucidum clear layer of epidermis
stratum corneum horny layer of epidermis
Dermis composed of dense irregular CT
Dermis consists of 2 layers or strata
Papillary layer where fingerprints are formed
Reticular layer makes up 80% of Dermis, where wrinkles form
Hypodermis Superficial Fascia aka
Hypodermis where fat lies not part of skin
Skin Color clinically important in indicating disease or emotional state
Skin Color Pigments melanin, carotene.hemoglobin
Melanin reddish-brown/black exp. moles
Carotene yellowish-orange exp. heels
Hemoglobin pinkish exp. shows through light skin
Erythema redness due to fever, hypertension, inflammation or allergy
Pallor paleness due to anemia, hypotension. surgery
Jaundice yellowness due to liver disorder or failure
Bronzing metallicness due to Addisons Disease-Adrenal
Blue/Black colored bruises due to vit C deficiency or falls
Cyanosis Blue due to oxygen deficiency, heart failure, resp disorders
Skin Cancer commonly caused by exposure to UV rays
Assymetry ABCD Rule- sides don't match
Border ABCD Rule- Irregular
Color ABCD Rule- Red, blue, black
Diameter ABCD Rule- bigger than 10mm
Types of Skin Cancer Basal Cell Carcinoma, Squamous Cell Carcinoma, Melanoma
Basal Cell Carcinoma most common and least malignant skin cancer
Squamous Cell Carcinoma skin cancer that grows rapidly, successfully removed if caught early
Melanoma least common and most dangerous type of skin cancer
Regeneration process by which damaged tissues repair themselves
Fibrosis Process of repair through scar tissue
Skin Repair Inflamation, Organization, and Regeneration are steps of
Created by: schell912