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Skin
Flashcards for Skin Test
44
Anatomy
12th Grade
10/27/2013

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Term
Function of Body Membranes
Definition
Line or cover body surfaces, protect body surfaces, lubricate body surfaces.
Term
Mucous Membrane
Definition
Epithelial sheet with underlying connective tissue. Common locations are nose,mouth, digestive tract, often adapted for absorption or secretion.
Term
Serous Membrane
Definition
Simple Squamous Epithelium, Lines open body cavities that are closed to the exterior of the body such as lungs and heart
Term
Cutaneous Membrane
Definition
Keratinized Stratified squamous epithelium, Skin, dry membrane, outermost protective boundary from external dangers and prevents water loss.
Term
Synovial Membrane
Definition
Connective Tissue Membrane, found in joints, cushions organs moving against each other during muscle activitiy, decreases friction
Term
Skin is what type of membrane?
Definition
Cutaneous Membrane
Term
Skin functions
Definition
Protection against mechanical, chemical, bacterial, and thermal damage and also ultraviolet radiation and dryness because of lack of water
Term
2 main divisions of the skin
Definition
epidermis and dermis
Term
layer that anchors the skin to underlying organs
Definition
hypodermis
Term
5 layers of epithelium
Definition
Stratum Corneum, Stratum Lucidum, Stratum Granulosum, Stratum Spinosum, Stratum Basale
Term
Stratum Corneum
Definition
shingle-like dead cells, oldest cells, cells full of keratin constantly flaking off
Term
Stratum Lucidum
Definition
only exists in people with thick skin,
Term
Stratum Basale
Definition
Cells undergo mitosis here, most inferior epidermal layer, site of melanin formtaion, rapid cell dvision
Term
Layer where most melanocytes are found
Definition
Stratum Basale
Term
Upper layer of dermis
Definition
papillary layer - upper dermal region, has fingerlike projections from its superior surface called dermal papillae. Contains pain receptors and touch receptors
Term
lower layer of dermis
Definition
reticular layer, deepest skin layer, contains blood vessels, sweat and oil glands
Term
Sebaceous glands
Definition
found in the reticular layer, usually near hair follicles, oil glands, sebum that is secreted is typically emptied into a hair follicle but some empty on skin surface.
Term
Sebum
Definition
mixture of oily substances and fragmented cells, lubricant that keeps skin soft and moist and also can kill bacteria.
Term
Sweat glands
Definition
Two kinds, eccrine- found all over, produce sweat secreted through a pore. Sweat regulates body temp and inhibits bacteria growth. Other kind is apocrine- largely found in axillary and genital areas of the body. Secretion contains fatty acids and proteins. Secretion is odorless, but when bacteria that live on the skin uses its proteins and fats as a source of nutrients for their growth, it takes on a musky unpleasant odor
Term
Hair layers?
Definition
layers - medulla, cortex, cuticle
Term
Hair where produced?
Definition
where produced - hair follicles, formed in the stratum basale
Term
What is hair made of?
Definition
dead keratinized cells
Term
hair structures?
Definition
arrector pilli - connects each side of the hair follicle to the dermal tissue. When these muscles contract, the hair is pulled puright, dimpling the skin surface with "goose bumps"
Term
Nails
Definition
nail matrix is responsible for growth
Term
Nail bed
Definition
extension of the stratum basale
Term
lunula
Definition
white crescent near bottom of nail, low blood supply that's why it's white
Term
athletes foot
Definition
caused by fungus
Term
boils and carbuncles
Definition
caused by bacterial infection
Term
cold sores
Definition
caused by virus
Term
contact dermatitis (rash)
Definition
caused by allergic reaction
Term
impetigo
Definition
caused by bacterial infection
Term
psoriasis
Definition
cause is unknown, triggered by trauma, infection, stress
Term
danger of burns
Definition
tissue damage and cell death caused by heat, electricity, UV radiation or chemicals
Term
burns can also lead to…
Definition
dehydration, electrolyte imbalance, circulatory shock
Term
rule of 9's
Definition
division of the body into 11 areas that each are about 9%, used to determine the extent of burns, how much fluid is lost
Term
1st degree burns
Definition
only epidermis is damaged, skin red and swollen
Term
2nd degree burns
Definition
epidermis and upper dermis are damaged, blisters
Term
3rd degree burns
Definition
destroys entire skin layer, blanched skin, gray-white or black colored, can only be fixed with grafting
Term
critical burns
Definition
over 25% of the body has 2nd degree, over 10 % of body has third degree, or third degree burns of face, hands or feet
Term
Basal Cell Carcinoma
Definition
least malignant or likely to spread, most common type, arises from stratum basale.
Term
Squamous cell carcinoma
Definition
arises from stratum spinosum, metasizes to lymph nodes, early removal allows a good chance of cure
Term
Malignant melanoma
Definition
most deadly of skin cancers, cancer of melanocytes, metasizes rapidly, detection uses ABCD rule
Term
ABCD rule
Definition
A= asymmetry, b= border irregularity, c= color, d= diameter 6 mm
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