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Integumentary System (Integumentary General Functions (Temperature…
Integumentary System
Integumentary General Functions
Protection
Waterproof barrier from outer elements
Including UV radiation
Temperature Regulation
blood vessels
Increases/Decreasesdiameter
Allows more/less heat brought to skin
Sweat glands
Excretion
Excretes water
Excretes Electrolytes
production of vitamin D
Produced with help of radiation
Helps absorb Calcium
For strong bones
Sensory reception
Cell types in epidermis
Melanocyte
pigment producers
melanin
Tactile epithelial cells
sensory receptor
sensitive to touch
Stem Cells
Produce keratinocyte
Stratum basale
differentiate
become different
Dendritic Cells
member of immune system
found in stratum spinosum
mobil
Keratinocytes
most abundant type of cell
have abundant kerotin
tough protein
Layers of Epidermis
Stratum Granulosum
granules that produce a waterproofing glycolipid
Stratum Lucidum
only found in thick skin
Stratum Spinosum
5 - 20 layers thick
superior to stratum basale
spines from fibers connected to sesmosomes
Stratum Corneum
Filled with keratin
dead cells
Stratum Basale
most abundant cell
Components
Connective tissue
In dermis
Reticular Layer
Dense Irregular Connective Tissue
Papillary Layer
Areolar Connective Tissue
Nervous Tissue
Nervous Receptors
Sensory Receptors
Epithelial Tissue
Stratified squamous epithelium
Epidermis
Muscle Tissue
Arrector Pilli
Hypodermis General Functions
Connection to deeper tissue
Insulation