Integumentary System Flashcards
Why is the skin considered a membrane?
Because it covers the body
Why are organs considered skin?
Because they contain several kinds of tissues
Why is skin considered a system?
Because it has many functions
The skin covers over 3,000 square inches of surface area, and accounts for about ___ of our total body weight.
15%
What is the outmost layer of the skin that is made up of 5-6 smaller parts and contains no blood vessels or nerve cells?
Epidermis
What are the two main layers of the epidermis?
Stratum corneum and stratum germinativum
Which layer of the epidermis is the outermost layer where cells constantly shed?
Stratum corneum
Which layer of the epidermis provides cells to replace cells in the strata corneum?
Stratum germinativum
What layer of the skin is known as the “cornium” or “true skin”?
Dermis
What layer of the skin contains blood vessels, nerves, oil and sweat glands?
Dermis
What’s another name for oil and sweat glands?
Sebaceous glands
What layer of the skin contains elective connective tissue and involuntary muscle?
Dermis
Within the dermis, there are ridges that form patters that are unique to each individual, what are these called?
Fingerprints
What part of the skin is used as a method of identification?
Fingerprints
What is the innermost layer of the skin?
Subcutaneous fascia (hypodermis)
What’s another name for the subcutaneous fascia?
Hypodermis
What layer of the skin contains adipose, fibrous connective tissue, and connects the skin to underlying muscles?
Subcutaneous fascia (hypodermis)
What’s another name for adipose?
Fatty tissue
The root of hairs grows in a hollow tube called a ___.
follicle
What is the main part of the hair that extends through the dermis and epidermis to outside the body?
Hair shaft
What are the functions of hair?
- Protect the body
- Aid in temperature regulation
- Serve as a warning
Hair covers all areas of the body except:
- Palms of hands
2. Soles of the feet
What’s the function of nails?
Protect the fingers and toes from injury
What are nails made of?
Dead keratinized epidermal epithelial cells that are packed densely
Where are the cells that make up nails formed?
Nail bed
The cells of nails will regrow if the ___ is not damaged.
nail bed
What are the functions of the integument?
- Protection
- Sensory perception
- Regulation of body temperature (Vasoconstriction and Vasodilation)
- Storage
- Absorption
- Excretion
- Production
What kind of things does the integument protect you from?
- The sun’s rays
- From invasion of pathogens
- Holds moisture in and prevents tissues from drying out
What kind of sensory perception does the integument provide?
Nerves are present in the skin so they help us respond to pain, pressure, temperature (heat/cold), and touch sensations
What is vasoconstriction?
Blood vessels get smaller and retain heat (hold heat in when we are cold)
What is vasodilatation?
Blood vessels get larger and allow excess heat to escape through the skin (sweating, etc. when we are hot and need to cool down)
How does the skin provide storage?
The skin has tissues for temporary storage of fat, glucose (sugar), water, vitamins, and salts. The fat that is stored may be used as an energy source.
How is the skin’s absorption function used?
Medications are used through absorption in the skin. Ex: Motion sickness medication, heart medication, nicotine patches, hormones, etc…)
What kind of medications are absorbed through the skin?
Transdermal medications
Sticky patches placed on the skin
What function of the skin helps the body eliminate salt, and excess water through sweating?
Excretion
What function of the skin helps in the production of Vitamin D which it obtains from the sun’s rays?
Production
How is vitamin D obtained?
From the sun’s rays
What is the brownish-black pigment whose production is determined by the genes present in each racial group?
Melanin
What activates the melanin to produce more to tan the skin?
UV light
What forms freckles?
Small concentrated areas of melanin pigment
What is the yellowish, red pigment that also helps to determine skin color?
Carotene
What is the absence of color pigments?
Albino
What are the characteristics of albinos?
Skin has pinkish tint, hair is pale yellow or white, and eyes are red in color and very sensitive to light.
What abnormal skin color has a reddish color and is caused by burns or a congestion of blood in the vessels? (Infection/inflammation)
Erythema
What abnormal skin color has a yellowish color and can indicate liver and/or gallbladder problems?
Jaundice
What abnormal skin color has a bluish discoloration and is caused by insufficient oxygen associated with heart, lung, and circulatory problems?
Cyanosis
What abnormal skin color gives warning of chronic poisonings?
Gray or brown
What are macules?
Flat spots. (Ex: Freckles)
What are papules?
Firm raised areas. (Seen in pimples, and early stages of the chicken pox)
What are vesicles?
Blisters or sacs full of fluid. (Second stage of chicken pox)
What are pustules?
Sacs filled with pus. (Acne or pimples)
What are crusts?
Areas of dried pus and blood. (Commonly called scabs)
What are wheals?
Itchy, elevated areas with an irregular shape. (Hives and bug bites)
What are cysts?
Closed sacs with a distinct membrane that develops abnormally in a body structure. (Usually filled with fluid material)
What are ulcers?
Deep loss of skin surface that may extend into the dermis. (May cause bleeding and formation of scars)
What is a decubitus ulcer?
Common where bones are close to the skin and have prolonged pressure on an area that interferes with circulation. (Ex. Tailbone, hips, knees, ankles, elbows, etc…)
What are other names for a decubitus ulcer?
Pressure ulcer or bed sore
How many stages does a decubitus ulcer have?
4 (I, II, III, IV)
In which decubitus ulcer stage is there red or blue/gray discoloration that does not disappear after pressure has been relieved?
1 (I)
In which decubitus ulcer stage are there abrasions, bruises and/or open sores as a result of tissue damage to the top layers of the skin?
2 (II)
In which decubitus ulcer stage is there a deep open crater that forms when all layers of the skin are destroyed?
3 (III)
In which decubitus ulcer stage is there damage that extends into the muscle, tendon, and bone tissue?
4 (IV)
How can you prevent the formation of decubitus ulcers?
Turn pts. every 2 hours
What is the baldness or lack of hair growth that is permanent, genetic, and more common in men?
Alopecia
What is acne vulgaris?
Inflammation of the sebaceous glands
When does acne vulgaris occur?
Usually occurs at adolescence from hormonal changes
What are the S/S of acne vulgaris?
Papules, pustules, and blackheads. Hair follicle becomes blocked with dirt, cosmetics, excess oil, and/or bacteria.
That is the Tx for acne vulgaris?
Frequent & thorough washing of the skin with soap/water, topical antibiotics, chemical peels, microdermabrasion, avoid creams & heaving makeup
What is athlete’s foot?
Contagious fungal infection that usually occurs on the feet
What are the S/S of athlete’s foot?
skin itches, blisters, and cracks into open sores
What is the Tx for athlete’s foot?
Antifungal medication (topical and/or oral), keep area clean and dry
What is basal cell carcinoma?
Cancer of the basal cells in the epidermis of the skin that grows slowly and does not usually spread
What are the characteristics of basal cell carcinoma?
- Lesions can be pink to yellowish-white in color
2. Lesions are usually smooth with a depressed center and an elevated, irregular shaped border
What is squamous cell carcinoma?
Affects thin cells of epithelium but can spread quickly to other areas of the body
What are the characteristics of squamous cell carcinoma?
Lesions start as small, firm, red flat sores that later scale and crust
What are sores that do not heal?
Frequently, squamous cell carcinomas
Where does melanoma develop?
Develops in melanocytes of the epidermis
What is the most dangerous type of skin cancer?
Melanoma
What are the characteristics of melanoma?
- Lesions can be brown, black, pink, or multicolored
2. Lesions are usually flat or raised slightly, asymmetrical in shape, and irregular or notched on the edges
What does skin cancer frequently develop from?
Develops from a mole or nevus that changes in color, shape, size, or texture
Bleeding and itching of a mole can also indicate ___.
cancer
What are the some causes of skin cancer?
- Exposure to the sun
- Prolonged use of tanning beds
- Irritating chemicals
- Radiation
What is the treatment for skin cancer?
Removal of lesion 1. Cryotherapy-freezing 2. Laser therapy 3. Surgical excision Radiation and/or chemotherapy may be used after the removal of the lesion depending on the degree of the cancer
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