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Science of Hair: Hair Growth Cycle & How Hair Works - WebMD
When this muscle contracts, it causes the hair to stand up which also causes the sebaceous gland to secrete oil. The sebaceous gland is vital because it produces sebum, which conditions the...
https://www.webmd.com/skin-problems-and-treatments/hair-loss/science-hair
Human hair growth - Wikipedia
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.
https://en.wikipedia.org/wiki/Human_hair_growth
Why Does My Hair Grow So Fast? | 5 Interesting Reasons
How long and fast it grows comes down mainly to genetics, although some environmental factors may come into play. 1. Genetics Our genetics controls nearly everything about our physical appearance. DNA is what determines hair length, density, and color, as well as growth stages. Hair goes through cycles of growth, transition, resting, and shedding.
https://youprobablyneedahaircut.com/why-does-my-hair-grow-so-fast/
Why do we grow more hair on our heads than on our bodies?
Head hair also helps retain heat at night. "Our brains are relatively small compared to the rest of our bodies, but they're enormously metabolically active," Pagel said. This activity produces...
https://www.livescience.com/why-hair-on-head.html
Why do humans have body hair? | HowStuffWorks
The process of cellular division that increases the length of the hair shaft is the active, or anagen, phase. The anagen phase continues for a period depending on the type of body hair, then slows down for the resting, or telogen, phase. Since your hair is made up of dead matter, it falls off during the telogen phase.
https://health.howstuffworks.com/human-body/parts/human-body-hair.htm
8 Causes of Slow Hair Growth & 13 Ways To Make Hair Grow Faster - Hairguard
The 8 Main Causes of Slow Hair Growth Vitamin Deficiency Perhaps you think that your diet is varied enough to avoid major vitamin deficiencies. However, even the slightest deficiencies can lead to slow – or even stagnant – hair growth. Vitamins play a critical role in the way the body functions.
https://www.hairguard.com/slow-hair-growth-causes/Why Does Hair Grow In My Ears as I get Older? Find Out Today - Male Groomed
Why is the hair in my ears getting longer as I age? As a man ages, hair follicles in the ear multiply due to hormonal changes that alter and increase the length of the growing phrase for hair. Most of the ear hair growth appears on the outer part of the ear making it visible to others.
https://malegroomed.com/why-does-hair-grow-in-my-ears-as-i-get-older/
Why does hair turn gray? - Harvard Health
Your hair follicles produce less color as they age, so when hair goes through its natural cycle of dying and being regenerated, it’s more likely to grow in as gray beginning after age 35. Genetics can play a role in when this starts.
https://www.health.harvard.edu/blog/hair-turn-gray-2017091812226
Hair on Your Breasts or Nipples Is Normal: Why It Happens, What to Do
That’s because, according to Chen, hormonal fluctuations like pregnancy or menopause can cause the hair around areolae to darken, making it more visible, or cause additional hair growth to occur ...
https://www.healthline.com/health/hairy-boobs
What’s the Purpose of Pubic Hair? And 8 Other FAQs - Healthline
Yes, pubic hair does have a purpose. Above all else, it lessens friction during sex and prevents the transmission of bacteria and other pathogens. There are probably other reasons why we have ...
https://www.healthline.com/health/purpose-of-pubic-hair
