Class notes
Integumentary system
- Course
- Bio2630
- Institution
- Oakland Community College
Provides in-depth notes for integumentary system off slides for exam 2
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Parts of Integumentary system1 Skin
2 Hair
3 Nails
4 Sweat glands
5 sebacious glands
structure of skin
Epidermis epithelial tissue that is Avascular
Keratinized stratified squamousepithelium
Cellsfound
connected desmosomes
Keratinocytes produce keratin tightly by
Melanocytes Spidershaped deep in epidermis produce melanin
packaged into melanosomes protectnucleusfrom UVdamage
Dendritic cells star shapedmacrophages deep in epidermis
Tactilecells sensoryreceptors
Layers
1 Stratum basale
Deepest
Single row of stemceylls
Daughtercell Daughter cell
stratumspinosum stratum basale stay
, 2 Stratum spinosum
Thick
web like system of intermediate pre keratin filament
attached to desmosomes
Resisttension pulling
Spiky keratinocytes
Contains keratinocytes melanosomesdendritic cells
3 Stratum Granulosum
Thin layer
Cellsappearancechanges
flatten nuclei organelles goaway
Keratinization happends
Keratohyaline Keratinfibers in upperlayers
Lamellar water resistant glycolipids to slow water loss
last layer of livingcells too far from capillaries
4 Stratum lucidum
only in palms soles of feet
Thin clear 2 3 rows of flat dead keratinocyte
5 Stratum corneum
20 30 rows of flat anucleated keratinized deadcells
Functions
1 Protectdeepercells from theenviornment
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