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