Download - Creighton Laser Consultants
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