Structure of Hair
Define Tricology
Scientific study of hair and its diseases
What are the three types of hair
Lanugo, Vellus Hair, Terminal Hair
Most effective stage for hair removal
Anagen
What is hair growth determined by?
Genetics and ethnicity as well as health and hormonal influences
A group of symptoms that when combined, characterize a disease or disordee
Syndrome
Contains hair follicle and its appendages, including hair root, hair bulb, hair papilla, hair shaft, and arrector pili muscles and sebaceous glands.
Found in areas that are not covered by larger coarse terminal hair.
Vellus hair
Shortest part of the hair growth cycle
Catagen phase
Genetically and ethnically inherited
Hypertrichosis
Pathological caused by viruses and bacteria with signs and symptoms,
Disease
Hair grows from cell division
Hair bulb
HormonAl changes, during puberty,
Terminal Hair
Mitosis ceases,hair has completed its growing phase
Catagen Phase
Caused by excessive male androgens in the blood
Hirsutism
Disorders
Basal cells in the hair matrix divide and form three main layers of the hair shaft. What are those layers
The cuticle, cortex, medulla
Not recommended to tweeze, shave, or wax
How long does scalp hair stay in the Anagen phase? And what determines the length of hair?
For years
lenghth of the anagen phase
Can occur due to manual life occurrences, medical procedures and treatments
Hypertrichosis
Explain the difference between a disease and a disorder
A disease has a known cause, while a disorder is a dysfunction that may not have a clear cause
Necessary for hair growth and nourishment of follicle
Hair papilla
Contracts when affected by cold
Arrector Pili Muscle
What is a result of hair growth?
Cell activity found in the basal layer within the hair bulb.
in Women normal imbalances, excessive androgens , menopause
Hirsutism
What is a seborrheic dermatitis and why
irregular skin behavior
flaky oily skin