Creighton Laser Consultants

Creighton Family Medicine-Twin CreekCarlos Prendes MD Nancy Rounds CMA

Joseph Stangl PAC

OverviewOverview

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

EpidermisEpidermis

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

MelanocytesMelanocytes

Located in epidermis

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

Five Layers of the EpidermisFive Layers of the Epidermis

Other layers of the skinOther layers of the skin

Dermis:Papillary dermis

Reticular Dermis

Subcutaneous Tissue

DermisDermis

Middle layer-ThickestThree 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

DermisDermis

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 TypesFitzpatrick Skin Types

Skin Type Skin Color How the skin reacts to sun

I Very fair, "transparent" Always burns, never tans

II Fair Always burns, tans with difficulty

III Fair to light olive Burns mildly, tans slowly

IV Olive to brown Rarely burns, tans with ease

V Dark Brown Very rarely burns, tans very easily

VI Black  Never burns, tans very easily

Types of HairTypes 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 CycleHuman Hair Growth Cycle