Hair Structure
hair structure beneath the skin surface
What is the hair root
The primary function of hair
Insulate the body from the heat and cold
3 parts of the hair shaft
cuticle, cortex, and medulla
the thickest part of the hair shaft. It is filled with keratin and protein cells that originate in the matrix.
cortex
is protected in the dermis of the skin and is cocooned within the follicle.
hair root
hair structure, also known as the stem, that extends above the skin surface.
What is the hair shaft
The secondary purpose of hair
for adornment
It has been said that hair is known as what
crowning glory
the deep, angular, pocket-like
depression in the scalp.
hair follicle
At the base of the hair root
hair bulb
A mature strand of hair is divided into two parts:
hair root and hair shaft
short, fine “baby” hair
vellus hair
The crown in crowning glory represents what
the regal beauty and power of the tresses (long hair)
Hair is defined as
threadlike outgrowth of the epidermis of the skin and scalp
made up of cells from the dermis (inner layer of the skin) directly underneath the hair follicle. It is the cone-shaped connective tissue that is designated to enclose the base or bulb of the hair follicle
dermal papilla
One reason for the dry, fragile quality of the African hair type is what
the tightly coiled hair makes it difficult for the natural oils to be distributed along the entire hair shaft.
the coarser, longer
hair found throughout the body.
terminal hair
The word glory in crowning glory symbolizes a source of what
pride, self-care and self esteem
We are born with how many follicles on our head
between 100,000 and 150,000
sac-like structures that provide the follicle with natural oils. They are the hair’s natural conditioners.
Sebaceous glands
three phases of hair growth
anagen, catagen, and telogen
Hair types fall into three very general divisions
Asian, European, and African.
As natural stylist our most common interest are in what
hair growth, hair typing, hair care, and styling.
Basic hair structure contains these 5 parts
the follicle, bulb, dermal papilla, arrector pili muscle, and sebaceous glands
a small, involuntary muscle attached to the underside of a hair follicle. Fear or cold causes this muscle to contract and makes hair stand up straight, giving the skin the appearance of “goose bumps.”
Arrector Pili Muscle