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The Integumentary sy

chapter 5

TermDefinition
EPIDERMIS outermost layer
EPIDERMIS Consists of epithelial tissue and is avascular​
DERMIS underlies epidermis & makes up bulk of skin​
DERMIS Mostly dense connective tissue, vascular​
Subcutaneous tissue HYPODERMIS
HYPODERMIS Mostly adipose tissue with some areolar tissue​
HYPODERMIS Loosely anchors skin to underlying structures​
HYPODERMIS Shock absorption and insulation​
Cells found in the epidermis Keratinocytes, melanocytes, dendritic cells, and merkel cells
KERATINOCYTES Produce fibrous keratin
KERATINOCYTES Major cells of epidermis​
KERATINOCYTES Millions slough off every day producing a new epidermis every 25–45 days​
MELANOCYTES Spider-shaped cells located in deepest epidermis​
MELANOCYTES Produce pigment melanin, which is packaged into melanosomes​
MELANOCYTES Melanosomes are transferred to keratinocytes; melanin protects keratinocyte nucleus from U V damage​
DENTRITIC CELLS Star-shaped macrophages that patrol deep epidermis​
DENTRITIC CELLS Ingest foreign substances and are key activators of the inmune system
MERKEL CELLS Sensory receptor to touch located at epidermal-dermal junction
Created by: mikaela_rsls
 

 



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