Creighton Laser Consultants Creighton Family Medicine-Twin Creek Carlos Prendes MD Nancy Rounds CMA Joseph Stangl PAC

Overview The different layers of the skin The skin’s role in the human body Hair follicles and the skin Science of Laser treatments Hair removal Pigmented skin lesion treatments Vascular Treatments

General Skin Facts Largest organ Three layers: Epidermis Dermis Subcutaneous tissue Thick and thin

General Skin Facts Protection Defense Sensation Heat regulation Storage Excretion Absorption

Epidermis Topmost-.5 to 1mm thick Completely renews itself every 3 to 5 weeks Thickness varies Five layers Made up of 3 types of cells: Langerhans cells Melanocytes Keratinocytes

Melanocytes Located in epidermis Produce melanin, a brown pigment that helps screen against the harmful effects of UV light.

Five Layers of the Epidermis

Other layers of the skin Dermis: Papillary dermis Reticular Dermis Subcutaneous Tissue

Dermis Middle layer-Thickest Three types of tissue not in layers: Collagen, elastic tissue and reticular fibers. Contains capillaries, lymph nodes, sebaceous glands, sweat glands, hair follicles, some nerve and muscle cells

Dermis Two zones: papillary and reticular Immune cells present involved in defense against foreign invaders passing through epidermis

Subcutaneous Tissue Innermost tissue Mainly fat Physiological function: insulation and storage of nutrients.

Fitzpatrick Skin Types Skin TypeSkin ColorHow the skin reacts to sun IVery fair, "transparent"Always burns, never tans IIFairAlways burns, tans with difficulty IIIFair to light oliveBurns mildly, tans slowly IVOlive to brownRarely burns, tans with ease VDark BrownVery rarely burns, tans very easily VIBlack Never burns, tans very easily

Types of Hair On most adult humans there are two main types of hair: Terminal hair Vellus hair A third type, lanugo hair, is present in the fetus, and some newborn babies. It can also be seen on the bodies of those who are extremely emaciated.

Human Hair Growth Cycle