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Chapter 7, Skin Structure, Growth and Nutrition

Milady's Standard Cosmetology
by

gregory brassel

on 26 February 2015

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Transcript of Chapter 7, Skin Structure, Growth and Nutrition

Thanks for viewing
Congratulations!

You have completed one unit of study toward course completion.

Summary and Review (continued)

List three types of nerve fibers found in the skin.
Name the two types of glands contained within the skin and describe their functions.
What are collagen and elastin?

Define dermatology.
Briefly describe healthy skin.
Name the main divisions of the skin and the layers within each division.

Summary and Review

Mild dehydration slows metabolism by 3 percent.
Drinking water reduces hunger pangs.
Water reduces cracked skin on feet and lips.
Dehydration causes fatigue.
Drop in body water of 2 percent can cause fuzzy, short-term memory.

Water Benefits

Comprises 50 to 70 percent of body’s weight
Sustains the health of cells
Aids in elimination of toxins and waste
Helps regulate body temperature
Aids in proper digestion

Water and the Skin

We are what we eat!
Vitamin A: improves elasticity and thickness
Vitamin C: accelerates healing process
Vitamin D: enables absorption of calcium
Vitamin E: protects against sun’s rays
Food supplements: should not replace healthful eating

Maintaining Skin Health

Eat a variety of foods.
Eat fruits, vegetables, and grains.
Eat moderate salt and sugar.
Drink appropriate amount of water.
Minimize alcohol intake.
Exercise appropriately.
Maintain/improve body weight.

Dietary Guidelines

Food Pyramid Groups

Protection
Sensation
Heat regulation
Excretion
Secretion
Absorption

Functions of the Skin

Collagen and elastin give strength, form, and flexibility to skin.
Collagen: a fibrous protein allowing skin to stretch and contract
Elastin: a protein base that forms elastic tissue; gives skin elasticity

Strength and Flexibility of Skin

Skin Color (continued)

Depends primarily on melanin
Melanin: tiny grains of pigment in stratum germinativum
Pheomelanin: red to yellow in color
Eumelanin: dark brown to black in color
Heredity: Skin color varies among races (dark skin contains more melanin).

Skin Color

Motor nerve fibers: cause goose flesh
Sensory nerve fibers: send messages to brain
Secretory nerve fibers: regulate perspiration

Nerves of the Skin

Dermis is the underlying, inner layer of the skin.
Papillary layer: outer layer beneath epidermis
Reticular layer: deeper layer of dermis
Subcutaneous tissue: fatty layer below dermis

Dermis

Epidermis
Dermis

Divisions of the Skin

Hair
Nails
Sweat glands
Oil glands

Appendages of the Skin

Slightly moist
Soft and flexible
Smooth and fine-grained
Possesses slightly acid reaction
Reacts quickly to touch

Healthy Skin

Largest organ of the body
Covers two square yards
Weighs about nine pounds
Protects muscles, bones, nerves
Barrier against environment
Thinnest skin on eyelids
Thickest skin on soles of feet
Continued pressure causes callus

Skin Specifics

Dermatology
The medical branch of science that deals with the study of skin and its nature, functions, diseases, and treatment
Dermatologist
A physician engaged in the science of treating the structures, functions, and diseases of the skin

Anatomy of the Skin

Describe the structure and composition of the skin.
List the functions of the skin.
List the classes of nutrients essential for good health.

Objectives

“The happiest life is that which constantly exercises and educates what is best in us.”

– Hamerton

Chapter 7

Skin Structure, Growth, and Nutrition

Summary and Review (continued)

What are the five basic food groups?
Can the skin be nourished with cosmetics?
Name four vitamins than can help the skin and describe how they help
What is the one essential item that no person can live without, and why is it essential to the skin and body?

Essential nutrients
Carbohydrates
Fats
Proteins
Vitamins
Minerals
Water

Nutrition and Maintaining
Skin Health

Acne: chronic inflammation of sebaceous glands
Papule: small, round elevation on skin; contains no fluid but may develop pus
Pustule: inflamed pimple containing pus

Sebaceous Gland Secretions

Sudoriferous (sweat) glands: regulate body temperature and help eliminate waste; excretion of sweat is controlled by nervous system
Sebaceous (oil) glands: secrete sebum that lubricates skin and preserves softness of hair

Glands of the Skin

Nerve endings found in the papillary layer.
They register sensations:
Touch
Pain
Heat
Cold
Pressure

Sense of Touch

The blood supplies nutrients, molecules from food such as protein, carbohydrates, and fats, to the skin.
Nutrients are required for cell life, repair, and growth.
Lymph bathes skin cells, removes toxins and cellular waste, and has immune functions.

How Skin Is Nourished

Stratum corneum: horny, outermost layer
Stratum lucidum: clear, transparent layer
Stratum granulosum: granular layer
Stratum spinosum: spiny layer
Stratum germinativum: deepest layer

Epidermis

Anatomy of the Skin (continued)

Cosmetologist
One skilled in the cleansing, beautification, and health preservation of the skin
Esthetician
Specializes in cleansing, beautification, and health preservation of the skin

Objectives (continued)

List the food groups and dietary guidelines recommended by the U.S. Department of Agriculture (USDA).
List and describe the vitamins that can help the skin.

Summary and Review (continued)

Explain how collagen and elastin can be weakened.
What are six important skin functions?
What are six classes of nutrients the body needs and how are they obtained?


There will be a quiz at the end of this chapter.
Full transcript