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Human hair contains melanin which provides dark coloration and protection from UV radiation. Human hair can absorb and emit light across a wide range of wavelengths. The image above depicts melanin autofluorescence at 365-400 nm excitation from a strand of dark brown human hair. A woman with dark blonde hair.
Nov 9, 2022 · Learn how hair grows, what it's made of, and how it changes over time. Find out the difference between hair follicle and hair shaft, and the three stages of hair growth.
Jan 11, 2023 · The two main types of hair are the shorter and thinner "vellus" hairs (peach fuzz) found on the body and the longer and thicker "terminal" hairs. Examples of terminal hairs include the hair on your head, facial hair, eyelashes, eyebrows, pubic hair, chest hair and belly hair.
- 2023/01/11
Sep 25, 2023 · Learn about the structure and function of hair follicles, how they grow hair, and what factors affect their health. Find out about common hair conditions that affect the follicles and how to treat them.
- Sian Ferguson
Jun 28, 2024 · Learn about the structure, growth and function of human hair and other mammalian hairs. Find out how hair is formed, shed, renewed and used for different purposes.
- The Editors of Encyclopaedia Britannica
Oct 14, 2014 · The adult human hair is around 20–180 µm in width, and generally grows to a length of approximately 90 cm. It consists of many layers including the cuticle, the cortex and the medulla. These layers are bound together by the cell membrane complex ( Robbins, 2012 ).
Aug 14, 2023 · In humans, hair is thinner and lighter than in primates. Human hair aids in sweating thermoregulation and serves as a sense organ. Hair also protects from the elements, including UV radiation. Additionally, humans have specialized hair, such as eyelash hair and eyebrow hair.
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