A mature strand of hair is divided into 2 parts ________ and ______.

There are ______ structures of the hair root.

I am connected to the hair follicle and secrete sebum.

I am the small involuntary muscle in the base of the hair follicle.

I am a small cone shaped elevation at the base of the follicle. I provide blood, nerve supply and nutrients for hair growth.

Your body can naturally produce _______ of the _______ amino acids that make up our hair.

I am a thickened club shaped structure and am the lowest part of the hair strand.

I am the tube like depression in the skin that contains the hair root.

There are ______ main layers of the hair shaft.

The main layers of the hair shaft are __________

The outermost layer of the hair shaft, protects the inner structure of the hair.

The middle layer of the hair shaft, the elasticity, weight and natural color are located here.

The innermost layer of the hair composed of round cells.

A high pH swells the __________ and causes it to expose the ___________.

There is ____ % of the element carbon in hair.

There is _______ % of the element oxygen in the hair.

There is ______ % of the element Hydrogen in hair.

There is ____% of the element Nitrogen in the hair.

There is ____ % of the element Sulfur in the hair.

The hair, skin, nails and glands are part of the _________ system.

Newly formed cells mature and fill up with a fibrous protein called ____________.

The extreme strength and elasticity of human hair is the responsibility of the ____________.

A weak physical side bond easily broken by water and heat.

A weak physical side bond easily broken by strong alkaline or acidic solutions.

A strong chemical side bond that are broken by permanent waves and chemical hair relaxers.

Tiny grains of pigment in the cortex that give hair its natural hair color.

____________ provides the dark brown to black color to the hair.

Provides the red, ginger and blond tones to the hair.