Hair

2. Hair Structure Function Hair Follicle (follies = bag) (Pouch of epidermal cells) Support structure for hair (Nerve ending and Sebaceous Glands attach to it 1 2 3 4

Area of cell reproduction Structure Function Hair Bulb Area of cell reproduction 1 2 3 4

Hair Shaft (Area of keratinized cells above the epidermis) Structure Function Hair Shaft (Area of keratinized cells above the epidermis) -warmth -protection -sensory -prevents water loss 1 2 3 4

Hair Root (Papilla) (connective tissue) -holds hair in place Structure Function Hair Root (Papilla) (connective tissue) -holds hair in place 1 2 3 4

Structure Function Melanocytes -determine hair color 1

Structure Function Arrector pili muscle -contraction results in short hairs standing on end (goose bumps)

How is hair microscopically analyzed? Hair is composed of three principal parts:   Cuticle - outer coating composed of overlapping scales Humans have overlapping external scales Focus in and out to see scales

Medulla - central core Described as: continuous, fragmented, or absent  

Cortex - protein-rich structure surrounding the medulla; contains pigment Described by color Described by pigment patterns  

Hair Shape

Hair Tips Broken Glass Rounded- not cut Burned Cut

I shared a presentation called Hair Analysis Make sure you are entering information under the correct group Group ? Name Name To see details Adjust the light Focus in and out Crop your final picture Cuticle Cortex Medulla Cuticle Cortex Medulla