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Hair's breadth. Scanning electron microscope image of a human hair. A hair's breadth, or the width of human hair, is used as an informal unit of a very short length. [1] It connotes "a very small margin" or the narrowest degree in many contexts. [2][3][4][5][6][7]
The Andre Walker Hair Typing System, also known as The Hair Chart, is a classification system for hair types created in the 1990s by Oprah Winfrey 's stylist Andre Walker. [1][2][3] It was originally created to market Walker's line of hair care products but has since been widely adopted as a hair type classification system. [4][5][6] Walker's ...
It applies to hair of all different textures, not just curly hair. Here's how the different types break down. Type 1: Straight hair. Type 2: Wavy hair. Type 3: Curly hair. Type 4: Coily/kinky hair.
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The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair. Most common interest in hair is focused on hair growth, hair types, and hair care, but hair is also an important biomaterial primarily composed of protein, notably alpha-keratin.
The Tanner scale (also known as the Tanner stages or sexual maturity rating (SMR)) is a scale of physical development as pre-pubescent children transition into adolescence, and then adulthood. The scale defines physical measurements of development based on external primary and secondary sex characteristics, such as the size of the breasts ...
Cephalic index. The cephalic index or cranial index is a number obtained by taking the maximum width (biparietal diameter or BPD, side to side) of the head of an organism, multiplying it by 100 and then dividing it by their maximum length (occipitofrontal diameter or OFD, front to back). The index was once used to categorize human beings in the ...