Intro to skin and integuement Flashcards
What is Integument?
The enveloping membrane of the body including all derivatives of the epidermis
What is the approximate surface area of the skin (adult)?
1.5-2m2
What are the three key layers of skin? (outer layer first)
Epidermis
Dermis
Subcutis- subcutaneous layer
Which layer of the skin is avascular?
Epidermis
What are the layers of the epidermis from top to bottom (included in thick skin)
Stratum lucidum — (thick skin only
Stratum corneum Stratum granulosum Stratum spinosum Stratum basale Basement membrane
What cells does the Stratum basale contain?
columnar keratinocytes
What cells does the Stratum spinosum contain?
polyhedral keratinocytes
What cells does the Stratum granulosum contain?
3-5 layers flattened keratinocytes
What cells does the Stratum corneum contain?
corneocytes 20-30 cells thick
What cells does the Stratum lucidum contain?
dead keratinocytes
What is the Stratum basale for?
adherence
What is the Stratum spinosum for?
adherence/strength
What is the Stratum granulosum for?
waterproofing
What is the Stratum corneum for?
shedding layer
What is the scalp?
thin skin and subcutaneous tissue