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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Uploaded on May 4, 2021
Number of pages 3
Written in 2020/2021
Type Summary

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

Institution
Anglia Ruskin University (ARU)
Education
BSc
Course
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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