Skin (Module 2) Flashcards
1
Q
What are the 4 major functions of the skin?
A
Protection, Sensation, Thermoregulation, Metabolic functions.
2
Q
What are the 3 layers of the skin?
A
Epidermis, dermis, subcutis or hypodermis
3
Q
Slooughed off continually at the free surface
A
Keratin
4
Q
- compact layer of soft keratin
- flat scales
- anucleate
- desmosome attachment
- waterproof
A
Stratum Corneum
5
Q
- barely distinguishable
- flattened cells, mostly cell membrane
- translucent cytoplasm
- nuclei undergoing karyolysis
- think skin only
A
Stratum Lucidum
6
Q
- few layers
- flattened cells
- basophilic granules of keratohyaline
A
stratum granulosum
7
Q
- several layers
- polyhedral
- artifactual gaps with filaments give rise to the name prickle cells
- Langerhans cells are prominent.
A
Stratum Spinosum
8
Q
- Single layer
- cuboidal or low columnar
- mitotic figures may be seen
- hemidesmosomes attach to basement membrane
- desmosomes attach to each other
- melanocytes are found between keratinocytes
- Merkel cell sparsely scattered
A
Stratum Basale or Stratum Germinativum.
