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Class notes

Integumentary system

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Provides in-depth notes for integumentary system off slides for exam 2

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  • October 9, 2024
  • 7
  • 2024/2025
  • Class notes
  • Professor done
  • Integumentary system
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hrudyakishore12
Parts of Integumentary system
1 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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