Date post: | 05-Jan-2016 |
Category: |
Documents |
Upload: | godwin-allison |
View: | 214 times |
Download: | 0 times |
INTEGUMENTARY SYSTEMINTEGUMENTARY SYSTEM
YOUR SKIN
FUNCTIONS OF THE INTEGUMENTARY SYSTEM Protects the body Helps dispose of waste materials Acts as a receptor for touch, pressure, pain, Temperature Regulation Stores water, fat and vitamin D
Slide 4 of 22
LAYERS/REGIONS OF THE SKIN Epidermis: Most Superficial Dermis: Tough, Leathery Fibrous Connective
Tissue; Only Part Vascularized Subcutaneous(Hypodermis): Superficial
Fascia; Mostly Fat (Insulate & Absorb Shock); Anchors Skin to Underlying Structures
EPIDERMIS Outer layer of stratified squamous epithelial
tissue Avascular Complete regeneration every 35-45 days Thinner on scalp and armpit than on sole of
foot Cells of the epidermis
DERMIS This is the thick inner layer of skin Contains:1. blood vessels- When blood vessels constrict heat
is retained by the body/////// when blood vessels dilate heat is lost by the body
DERMIS ALSO CONTAINS
2. nerve fibers- feels pain, pressure3. Oil glands, & Sweat glands4.Melanin5. Hair roots
Contains:
Sebaceous glands keeps the hair follicles pliable , secrete oil to keep
skin and hair soft and moist
SEBACEOUS/OIL GLANDS
Location: all over the body except for palms & soles of feet
Secretion: sebum, oily substance Function: smooth & soften hair and skin;
slows water loss during dry weather
SUDORIFEROUS GLANDS
Sweat Glands: 2.5 million per person Cover entire skin surface except for
nipples and parts of external genitalia
ECCRINE SWEAT GLANDS
Most numerous Location: palms, soles of feet, forehead Secretion: sweat (99% water, salts,
nitrogenous wastes) Acidic pH 4 – 6 Purpose: temperature regulation Emotion induced sweating: no control
APOCRINE SWEAT GLANDS
Location: axillary, genital areas Size: larger than eccrine glands Secretions: same as eccrine PLUS fatty
deposits & protein Foul odor when fats & proteins decompose Begin to function at puberty
ACCESSORY ORGANS OF THE SKIN
Hair, Nails
NAILS
Keratinized/dead epidermal cells Grows under the lunula (white portion) of
nailbed Cells replace if nailbed is OK
HAIR
Hair: pili; made of keratin Shaft: projects from the skin Root: embedded in the skin; shape determines
whether hair is straight or curly Pigment depends on melanocytes located in the
follicle
Hair – Is everywhere on the body except Palms and soles Hair color is determined by the concentration of
melanin
MEDICAL TERMINOLOGY CUT- Skin DERMA- skin EPI- around LIPO- fat MELAN-black CYAN- blue ONYCH-nail SUDOR—sweat HIDR- sweat ITIS-inflammation SEB- Sebaceous
SKIN ERUPTIONS
MACULES
MACULES
A macule is a flat discoloration that has a definite border. It can be brown, blue, red, or lighter than the surrounding skin.
PAPULES – RAISED AREAS, FIRM
Vesicles of poison ivy
PUSTULES,PUS FILLED
CRUSTS (SCABS)
WHEALS (HIVES)
SKIN ULCER
ACNE VULGARIS
ATHLETE’S FOOT
SKIN CANCER Most common type of
cancer and accounts for half of all new cancers in the western population.
Melanoma—Malignancy of the skin
Basal Cell Carcinoma lowest level cells become cancerous
Squamous Cell—type arising in squamous cell
SKIN CANCER
Skin Cancer is the single most common type of cancer in human. One in five Americans develop skin cancer at some point in their life. The cause of most skin cancer is not known, but the most important risk factor is overexposure to ultraviolet radiation in sunlight.
TYPES OF SKIN CANCER
Skin Cancer
The two most common kinds of skin cancer are basal cell carcinoma and squamous cell carcinoma
BASIL CELL CANCER
Untreated Invasive
SQUAMOUS CELL CANCER
SQUAMOUS CELL CANCER
DIFFERENT KINDS OF SKIN CANCER
DERMATITIS
ECZEMA
ECZEMA OF THE EYE LID
IMPETIGO
RINGWORM
WARTS
BURNS
FIRST DEGREE Redness, tenderness No blister SECOND DEGREE Into Dermis, blister, painful THIRD DEGREE Full thickness, often into the muscle,
RULE OF NINES
Way to figure the extent of a burn. The greater the area, the more problems you can anticipate
Problems include: respiratory difficulty infection temperature regulation fluid balance
SUNBURN
SECOND DEGREE BURN
THIRD DEGREE BURNS
ABNORMAL SKIN COLORS
CYANOSIS- bluish skin color due to low O2 levels
JAUNDICE- Yellow Skin color due to liver disease
ALBINO- Absence of all Melanin ERYTHEMA- Reddish color of skin