Hair is divided into 2 parts, the _______ and the ________.

The hair root is located ________

The hair shaft is located _______

Proper nutrition of proteins, good blood circulation and good hygiene is required for _________

The follicle, bulb, dermal papilla, sebaceous glands and arrector pili muscle are structures of the _____

The hair shaft is made up of 3 parts____ ______ _______

The outer most layer of the hair shaft is the ______

The cuticle determines the hair's ___________

Open scales (all the way) means the hair is __________

When the scales are closed the hair has ______ _______

The middle layer is called the ___________

All ___________ processes take place in the cortex.

Protein Keratin and melanin pigment is found in the ______

The inner most layer of the hair shaft is the ________

Name the 3 side bonds.

Hydrogen bonds are broken by _______ and __________

The salt bonds are broken by ____________

Disulfide bonds are broken by ______________

Peptide bonds link together and make a __________ shape called a __________

Hair pigment is called __________

Name the two types of melanin (pigment)

___________ melanin is responsible for brown and black color

__________ melanin is responsible for yellow and red color

A combination of eumelanin and pheomelanin is called.

__________ hair does not have melanin

Hair, skin and nails belong to the __________ system.