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Hair is a stratified squamous keratinized epithelium made of multi-layered flat cells whose rope-like filaments provide structure and strength to the hair shaft. The protein called keratin makes up hair and stimulates hair growth. Hair follows a specific growth cycle with three distinct and concurrent phases: anagen, catagen, and telogen. Each ...
Hirsutism is excessive body hair on parts of the body where hair is normally absent or minimal. The word is from early 17th century: from Latin hirsutus meaning "hairy". [2] It usually refers to a male pattern of hair growth in a female that may be a sign of a more serious medical condition, [3] especially if it develops well after puberty. [4]
In many cases, areas on the human body that contain vellus hair will begin to produce darker and thicker body hair during puberty, such as the first growth of beard hair on a male and female adolescent's previously smooth chin; although it may appear thinner on the female. Androgenic hair follows the same growth pattern as the hair that grows ...
An excessive growth of terminal hair on the body is called hypertrichosis. This medical term has to be distinguished from hirsutism that just affects women. These women can develop terminal hair on the chest following the male pattern as a symptom of an endocrine disease.
A relatively small number of women are able to grow enough facial hair to have a distinct beard. The condition is called hirsutism. It is usually the result of polycystic ovary syndrome which causes excess testosterone and an over-sensitivity to testosterone, thus (to a greater or lesser extent) results in male pattern hair growth, among other symptoms.
A cowlick is a section of human hair that stands straight up or lies at an angle at odds with the style in which the rest of an individual's hair is worn. [1] [2] The most common site of a human cowlick is in the crown, but they can appear anywhere on the head. They also sometimes occur in the front and back of the head. [citation needed]
A cynocephalus. From the Nuremberg Chronicle (1493).. The characteristic of cynocephaly, or cynocephalus (/ s aɪ n oʊ ˈ s ɛ f ə l i /), having the head of a canid, typically that of a dog or jackal, is a widely attested mythical phenomenon existing in many different forms and contexts.
The process of hair growth occurs in distinct sequential stages: anagen is the active growth phase, catagen is the regression of the hair follicle phase, telogen is the resting stage, exogen is the active shedding of hair phase and kenogen is the phase between the empty hair follicle and the growth of new hair. [1]