Integumentary System Flashcards
What are the functions of skin?
Protects from infection
Insulation
Protects from water loss
Vitamin D production
Protects from UV radiation
Sensation
Waste Removal
What are the layers of the skin?
Epidermis (epithelium) - Outer
Dermis (Conn. Tissue) - Middle
Hypodermis (Conn. Tissue) – Inner
What is the strata of the epidermis?
Stratum basale – ‘germinative layer’
Stratum spinosum
Stratum granulosum
Stratum lucidum (only in thick skin)
Stratum corneum
What are the keratinocyte functions of the epidermal cells?
Produce tough, waterproof keratin.
What are the melanocyte functions of the epidermal cells?
Produces melanin, melanin stored in
keratinocytes.
What are the langerhan cell functions of the epidermal cells?
From bone marrow, immunity
What has five layers, including the stratum lucidum?
Thick skin.
What are the merkel cell functions of the epidermal cells?
Deepest layer only, sensory neurons
What determines melanin from melanocytes?
Eumelanin, phaeomelanin
What has four layers, without the stratum lucidum?
Thin skin.
What determines carotene?
Vitamin A precursor, yellow- orange tinge
What determines hemoglobin?
In blood, red- pink color
