Hair Distribution, and Structure
Hair Bulb
The thickened, club-shaped structure that forms the lower part of the hair root
The outermost layer of the hair is called the
Cuticle
The maturing process of protein that grows from cells originating within the hair follicle
Keratinization
The three parts to the growth cycle.
Anagen, catagen, telogen
Technical Term for Dandruff
Pityriasis
Arrector Pilli
The small involuntary muscle attached to the underside of the hair follicle
he cuticle layer of the hair can be raised by
Swelling (raise in PH)
Hair protein made up of long chains of
Amino Acids
This is the growth phase. New hair is produce
Anagen
itching, scales, and sometimes, painful circular lesions
Tinea
Fear or cold causes this muscle to contract, which makes the hair stand up straight, giving the appearance of goose bumps.
Arrector Pili
Middle layer of the hair that gives elasticity
Cortex
A long chain of amino acids linked by peptide bonds
Polypeptide chains
This is the brief transition period between the growth and resting phase of a hair follicle
Catagen
Infestation of the hair and scalp with head lice
Pediculosis capitis
Oil glands, which consist of a sac-like structure in the dermis
sebaceous glands
Hair flowing in the same direction is known as
Hair stream
A bond that is a physical side bond that is easily broken by water or heat
Hydrogen Bond
This is also known as resting phase. It is the final phase in the hair cycle and lasts until the fully grown hair is shed
Telogin
Excessive hair growth
hypertrichosis
An oily substance secreted from the sebaceous glands that keeps the skin surface soft and supple
Sebum
The degree of coarseness or fineness of the hair
Hair Texture
This bond joins the sulfur atoms of two neighboring amino acids
Disulfide Bonds
How long is the hair in the growth cycle
2-6 Years
The technical term for gray hair
Canities