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  2.  
  3. Anglia Ruskin University (ARU)
  4.  
  5. BSc
  6.  
  7. Biomedical Science (MOD002739)

Summary

Summary The Ingumentary System
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  • Course
  • Biomedical Science (MOD002739)
  • Institution
  • Anglia Ruskin University (ARU)

skin, roles of skin, skin structure, epidermis, keratinisation, continual replacement of cells, dermis, subcutaneous tissue, hypodermis, sensory receptors, thermoregulation, hair, types of hair, glands, nails, repair, wound healing, damage classification, burns

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Document information

  • May 4, 2021
  • 3
  • 2020/2021
  • Summary

Subjects

  • skin
  • anatomy
  • ingumentary system
  • roles of skin
  • skin structure
  • epidermis
  • keratinisation
  • dermis
  • subcutaneous tissue
  • hypodermis
  • sensory receptors
  • thermoregulation
  • hair
  • types
  • continual replacement of cells

Written for

  • Anglia Ruskin University (ARU)
  • BSc
  • Biomedical Science (MOD002739)
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The Ingumentary System
SKIN Layers of the Epidermis
Roles of Skin  Stratum Corneum
(outermost)
 Protection and immunity
 Many sublayers of flat,
 Sensation
dead keratinocytes,
 Thermoregulation
continuously shed,
 Excretion and absorption
replaced by cells from
 Synthesis of Vitamin D
deeper strata
 Storage
 Stratum Lucidum
Skin Structure  Present only on thick
skin (fingertips, palms
Three major layers and soles)
 Epidermis  Transparent
 Outermost  Stratum Granulosum
 Thinner layers  Includes keratohyalin
 Dermis (cytoplasmic granules
 Bellow epidermis – promote
 Thicker layer dehydration, cross-
 Hypodermis linking of keratin
 Bellow the dermis fibres)
 Attaches skin to  Cells die in this layer
underlying tissue and  Stratum Spinosum
organs  8-10 layers of
keratinocytes with
desmosomes,
intracellular bridges
(“prickles”)
 Stratum Basale
 Deepest layer
 Continuous cell
division occurs
producing all other
layers-stem cells
Epidermis
Cells of the epidermis
 Keratinized stratified
 Keratinocytes (90% of cells)
squamous epithelial cells
 Produce keratin
 Avascular
(tough fibrous protein
 Multilayered, flexible, self-
that provides
repairing barrier
protection)
 Prevents fluids loss
 Melanocytes (8% of cells)
 Protects from UV radiation
 Produce melanin
 Produces vitamin D3
pigment (protects
 Resists abrasion, chemicals
against damage by
and pathogens
ultraviolet radiation)

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