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Anatomy & Physiology: The Integument

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james donahue

on 22 September 2016

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Transcript of Anatomy & Physiology: The Integument

Sudoriferous glands
eccrine - cools
apocrine - attracts
ceruminous - detracts
mammary - feeds
69 year-old trucker who spent 28 years on the road
Integument
Functions
Protection
Regulate Temperature
Communication
Excretion
Vitamin D Production
Epidermis
Dermis
Waterproof, avascular, dynamic
Stratified squamous epithelium
All cells dead (or dying) except deepest
Layers (strata)
Corneum
Lucidum
Granulosum
Spinosum
Basale
Corneum - all dead
Lucidum - thick skin only
Granulosum - keratinocytes
Spinosum - cells migrate
Basale - single layer,
actively dividing,
melanocytes
Pathology
Region of skin continuously pressed or rubbed increasing the mitotic rate of that area.
Dermal vessels compressed over a long period of time
Body thinks skin is a foreign pathogen
Location of accessory organs
Responsible for blood shunting
Rich in proteins
Accessory organs
Sebaceous glands
makes skin, hair and nails supple
Hypodermis
Not skin
Mostly fat and LCT
Nails
compressed epithelium
Hair
compressed epithelium
linked with sulfur bonds
trichosiderin (and melanin)
Burns
The rule of 9s
Estimates the severity of burns
25% of the body covered in second degree burns - CRITICAL
10% of the body covered in third degree burns - CRITICAL
Third degree burns on hands, feet or head - CRITICAL
WHY??
1 - risk of infection
2 - increased water loss
3 - inability to regulate
body temperature
So what gives
skin its color?
melanin (melanocytes) - dark skin
carotene (dietary) -
yellow
/
orange
hemoglobin (blood)-
pink
/
red
Layers
papillary - superficial
reticular - deep
Both layers rich in
collagen and elastin
Cancer
Basal Cell Carcinoma
arise from basal cells
least malignant
most common
slow growing
doesn't metastasize
cut it out
99% cure rate
Squamous Cell Carcinoma
arise from keratinocytes
grows rapidly
metastasizes
cut it out, radiation
Malignant Melanoma
arise from melanocytes
highly metastatic
resistant to chemotherapy
4mm lesion, prognosis
is poor
High intensity, intermittent Ultra-Violet (UV) light
Be sure you can:
Second degree burn
(due to freon)
How does this happen?
How does this happen?
Other burn
patterns
Dermal
Scarring
Melanoma
of the eye?

www.youtube.com/watch?v=o9BqrSAHbTc#
http://goo.gl/FLkqxR
Inking the skin...
https://goo.gl/Xd3j5y
https://goo.gl/W1K9BK
Balloons under
the skin???
Do these help
aging skin?
How does this happen?
Full transcript