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A lesson on basic skin structure for cosmetology students.
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SKIN STRUCTURE
Ms. SmithSkin Care
Introduction
Skin Facts Skin care is a multi-billion dollar
business. Skin is the largest organ of the
human body. (Average adult’s skin = 8 pounds and covers 22 square feet.)
The skin has many important functions.
We lose about 50 million skin cells a day!
Objectives
Objectives List the functions of the skin. Describe the structure and composition of
the skin. Define important terms relating to the skin.
Assessments Written – Test on Friday Practical – Facial exchange on Thursday
Word List
Dermatology Dermatologist Esthetician Dermis Epidermis Stratum Layers (5) Adipose Tissue Reticular Layer Body Temperature Papillary Layer Subcutaneous tissue
Sweat gland Sebaceous gland Sebum Follicle Collagen and Elastin Fibers
Dermatology
The study of skin Dermatologist vs.
Esthetician
Functions of Skin
Protection Sensation Heat regulation Excretion Secretion Absorption
Three Main Layers
Epidermis Dermis Subcutaneous
Subcutaneous
Fatty layer, also called adipose Bottom most layer of the skin Varies in thickness Gives smoothness and contour to the
body Energy source Protective cushion for the outer skin
Dermis
Above subcutaneous layer Sensitive layer of connective tissue that contains:
Blood vessels Lymph vessels Nerves Sudoriferous glands - sweat Sebaceous glands - oil Hair follicles Arrector pili muscles papillae
Two layers Reticular layer(deeper layer) Papillary layer (dermal papillae, tactile corpuscles, melanin)
Collagen fibers and elastin Allow skin to stretch and contract as necessary Weakened fibers = wrinkles, sagging, cellulite
Epidermis
Outermost layer (also called cuticle) No blood vessels Small nerve endings 5 layers
Stratum corneum Stratum lucidum Stratum granulosum Stratum spinosum Stratum basale
Structure of the Skin
Questions/Discussions
What gives skin its color? What gives skin its strength,
form, and flexibility? Name the 3 main layers of the
skin. Name the 5 layers of the
epidermis from top to bottom.