Transcript Ch07-2006 FINAL Skin Structure and Growth

Cosmetology:
Skin Structure
and Growth
Milady’s
Standard
Cosmetology
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
“Disciplining yourself to do what you
know is right and important,
although difficult, is the high road to
pride, self-esteem, and personal
satisfaction.”
Brian Tracy
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Objectives
• Describe the structure and composition of
the skin.
• List the functions of the skin.
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Anatomy of the Skin
• Dermatology
• Dermatologist
• Esthetician
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Histology of the Skin
• Largest organ of the body
• One of the most important body organs
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Skin Specifics
• The skin of a typical 150 lb. man would:
– Cover 2 square yards
– Weigh about 9 pounds
• Skin protects muscles, bones, nerves
• Skin is a barrier against environment
• Eyelids have thinnest skin
• Soles of feet are thickest
• Continued pressure causes callus
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Healthy Skin
• Slightly moist
• Soft and flexible
• Smooth and fine-grained texture
• Possesses slightly acid reaction
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Appendages of the Skin
• Hair
• Nails
• Sweat and oil glands
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Two Divisions of Skin
• Dermis
• Epidermis
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Epidermis
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Stratum germinativum
Stratum spinosum
Stratum granulosum
Stratum lucidum
Stratum corneum
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Dermis
• Papillary layer
• Reticular layer
• Subcutaneous
tissue
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
How Skin Is Nourished
• Blood supplies nutrients
• Lymph removes toxins and cellular
waste
• Arteries and vessels reach hair
papillae, hair follicles, and skin glands
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Nerves of the Skin
• Motor nerve fibers
• Sensory nerve
fibers
• Secretory nerve
fibers
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Skin Color
• Melanin
– Pheomelanin
– Eumelanin
• Hereditary
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Skin Strength and Elasticity
• Collagen
• Elastin
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Glands of the Skin
• Sudoriferous
glands (sweat)
• Sebaceous
glands (oil)
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Functions of the Skin
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•
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Protection
Sensation
Heat regulation
Excretion
Secretion
Absorption
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Vitamins and Supplements
•
•
•
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Vitamin A: Supports overall health
Vitamin C: Known as ascorbic acid
Vitamin D: Best source is sunlight
Vitamin E: Known as tocopherol
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Water and the Skin
• Comprises 50% to 70% of body weight
• Sustains health of cells
• Aids in elimination of
toxins and waste
• Helps regulate body
temperature
• Aids in proper digestion
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Consumption and Dehydration
• Divide body weight by 16.
• Result = Number of 8oz glasses of water
needed daily.
• Dehydration slows metabolism.
• Water consumption reduces hunger pangs.
• Lack of water causes fatigue.
• 2% drop can trigger fuzzy memory.
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Summary and Review
• Briefly describe healthy skin.
• Name the main divisions of the skin and
layers within each division.
• How is the skin nourished?
• List the three types of nerve fibers found in
skin.
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
• What is collagen?
• Name two types of glands contained in skin
and describe their functions.
• What are the six important functions of the
skin?
• Define dermatology.
MILADY’S
Standard
COSMETOLOGY
Instructor Support Slides
Congratulations!
You’ve just completed
one unit of study toward
program completion.