Integumentary system II Flashcards
What are the three layers of integumentary systems and how are they used to classify burns and frostbite injuries?
Epidermis
Dermis
Subcutaneous
classification based on what layers are effected.
What are the causes of acne?
- overproduction of sebum
- abnormal follicular desquamation
What are the various steps in injury repair?
Hemostasis
Inflammation
Proliferation
Remodeling
What are three types of epidermolysis bullosa and what is the unique feature of each type?
- EB simplex - abnormal tonofilaments
- Junctional EB - abnormal hemidesmosomes
- dystrophic EB - abnormal anchoring fibrils
How does the skin change with aging?
Cells:
1. Thinning
2. Decreased Sensitivity to infection
3. hormone production
4. Pale Skin
Appendages:
5. Dry skin
6. Always cold
7. Hair Follicles
8. Wrinkling
How are different types of skin cancers classified based on their layer of origin?
- Squamous Cell Carcinoma - statum spinosum/granulosum - cells with a nucleus.
- Melanoma - Stratum basal/germinativum in melanocyte
- Basal cell carcinoma (BCC) - stratum basale/germinativum
What are the 6 characteristics of melanoma?
- Assymetry
- Border
- Color
- Diameter
- Evolving
What degree burn affects the epidermis and consists of redness, pain to touch, and mild swelling.
typically caused by sunburns, quickly touching a hot stove
First degree burn
What degree burn affects the epidermis and regions of the dermis and consists of deep redness, increased pain, blistering, swelling.
typically caused by chemical burns
Second degree burn
What degree burn affects the epidermis, dermis, and hypodermis and consists of skin layer loss, dry/leathery/charred skin and is painless?
causes include fire victims and electric burns.
third degree burn
What step of wound healing:
Day 1
-prevent blood loss by platelet aggregation
-vasoconstriction
-blood clot (scab) forms (using fibrin)
-inflammation initiated
Hemostasis
What step of wound healing:
Day 1-4
-WBCs arrive to prevent infection
-macrophages release growth factors and engage in phagocytosis
Inflammation
What step of wound healing:
Day 4-21
-Fibroblasts enter wound and produce collagen during collagen deposition
-epidermal cells divide to reform outer layer
-blood vessels form
Proliferation
What step of wound healing:
Day 21-months
-Collagen is rearranged and blood vessels are strengthened.
-the scab gets replaced tissue matures to become scar tissue
-Epithelium cells are growing below the scab to eventually push their way to the surface to form a fully intact epithelium
Remodeling
Burns and frostbites are classified based on the ______ affected.
layer
