Download AP10 Ch4 Skin LectureNotes

PowerPoint® Lecture Slide Presentation
by Patty Bostwick-Taylor,
Florence-Darlington Technical College
Skin and Body
Membranes
4
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BODY MEMBRANES
 =
 Locations:
 Cover
 Line
 tissue:
 Epithelial
 Connective
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1. Mucous Membranes
 Stratified squamous
or Simple columnar &
areolar
 Locations:
 Mucus
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2. Serous Membranes
 Simple squamous & Areolar
 Locations
 serous fluid:
 Double membrane
 Specific types
 Peritoneum:
 Pleura:
 Pericardium:
 visceral vs. parietal
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3. INTEGUMENTARY SYSTEM
 Functions: see Table 4.1
 Layers: 2 and 1 below
 Epidermis
 Dermis
 Subcutaneous (Hypodermis)
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Skin Structure
Figure 4.3
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Skin Functions
Table 4.1 (1 of 2)
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Skin Functions
Table 4.1 (2 of 2)
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EPIDERMIS
 Tissue:
Layers
 Stratum basale
("germinativum)
 Location & # layers
 Below is
 Mitosis
 Every 25-45 days
 Cells:
 Keratinocytes
 Melanocytes: produce _________
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 Stratum spinosum
 St. granulosum
 Cells flatter
 St. lucidum-Dead
 Only thick skin:
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Epidermis …
 St. corneum-Dead
 Outermost
 # layers:
 cells are filled with _________ & __________
 Function
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DERMIS
 Overall
 Fibers:
 Blood vessls
 Temperature
 2 layers
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2 Layers of the Dermis …
 Papillary layer
 Location
 Tissue: Areolar
 Dermal Papillae:
 pain receptors

touch receptors
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 Reticular layer
 Dense Connective Tissue
 Blood vessels
 Sweat and oil glands
 Deep pressure receptors
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SUBCUTANEOUS TISSUE– HYPODERMIS
 Not part of the skin
 Anchors skin
 Areolar & adipose tissue
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SKIN APPENDAGES
 Sebaceous glands
 Produce:
 Functions
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Appendages of the Skin
 Sweat glands
 Produce
 Composition: water & salts, acidic
 Functions:
 Heat
 Wastes
 Bacteria
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Appendages of the Skin
 Hair
 Produced by:
 Hair follicle: sheath
surround hair root
 Matrix: cells
that produce hair
 Color from:
 Arrector pili muscle
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Appendages of the Skin
Figure 4.8
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Skin Homeostatic Imbalances
 Infections & Allergies– STUDENTS DO all
terms on page 123
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Skin Homeostatic Imbalances
 Burns
 caused by
 Associated dangers
 Dehydration
 Electrolyte imbalance
 Circulatory shock
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Rule of Nines
 Extent of burns
 11 body areas
 Each area = 9% surface area
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Severity of Burns
 First-degree burns
 epidermis damaged
 Skin = red, swollen
 Second-degree burns
 Epidermis & upper dermis
 Skin = … blisters
 Third-degree burns
 entire skin
 Skin = gray-white or black
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Critical Burns
 Critical:
 Over 25% = second-degree
 Over 10% = third-degree
 face, hands, or feet = third degree
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Skin Cancer
 Cancer—abnormal cell mass
 Classified
 Benign
 Malignant
 Metastasizes:
 most common type:
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Skin Cancer Types
 Basal cell carcinoma
 Least malignant
 Most common
 Arises from stratum basale
 Dome shaped with ulcer
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Skin Cancer Types
 Squamous cell carcinoma
 Metastasizes if not removed
 good chance of cure
 sun-induced
 from stratum spinosum
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Skin Cancer Types
 Malignant melanoma
 deadly
 melanocytes
 Metastasizes
 Detection ABCD
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ABCD Rule
 A=
 B=
 C=
 D=
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