Hair
Published on Dec 12, 2015
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PRESENTATION OUTLINE
Table Of Contents
- Why do we have hair?
- What is hair made of?
- Facts about follicles and what are follicles?
- Where are follicles
- The hair shaft and its layers
- Hairs growth
- Glossary and Bibliograph
Photo by Www.CourtneyCarmody.com/
Why do we have hair?
- Eyebrows: to protect our eyes from sweat
- Eyelashes: to protect our eyes from dust and dirt
- Head Hair: to cushion our head from falls, and to keep it warm in the Winter
Photo by alessandra celauro
Facts about Follicles
- There are 5 million follicles on your whole body
- There are 1 million follicles on your head
- We never ever generate new follicles
- The base of follicles is called the papilla and it carries blood vessells
Photo by TristanDuplichainPhotography
What are Follicles
A hair follicle is a skin organ that produces hair. Hair production occurs in phases, including growth (anagen), cessation (catagen), and rest (telogen) phases. Stem cells are responsible for hair production. It is a small tube in your skin.
Photo by kevin dooley
Where are follicles
And how do they grow
They are small tubes in your skin, so in your skin! (some of the time) When a follicle rises out of your skin then another follicle grows in your skin. It starts as root cells, and then they join to make Keratin the protein hair is made out of.
Photo by Zavarykin Sergey
The Hair Shaft
The Hair Shaft is made of a protein called Keratin with 3 layers. The protein is dead so the hair you see is dead.
Photo by Csizmadia Tamás
The layers or the hair shaft
- Medulla
- Cortex
- Cuticle
The Medulla is the inner layer of the hair shaft. It gives the hair color.
The Cortex is the second most outer part of the hair shaft. It also makes up most of the hair shaft. The Cortex like the Medulla give the hair color.
The Cuticle is made of shingle like overlapping scales. It is the hair you see most often.
The Cortex is the second most outer part of the hair shaft. It also makes up most of the hair shaft. The Cortex like the Medulla give the hair color.
The Cuticle is made of shingle like overlapping scales. It is the hair you see most often.
Photo by yopuz
Hairs Growth
In a year hair grows 15 centimeters or 6 inches.
In a month it grows 1.25 centimeters or half an inch.
In a month it grows 1.25 centimeters or half an inch.
Photo by Zavarykin Sergey
Glossary
Keratin: the protein hair is made of
Follicles: a small tube in skin that hair is made out of
Hair Shaft: something hair is made out of that has Keratin in it
Medulla: part of the hair shaft
Cortex: part of the hair shaft
Cuticle: part of the hair shaft
Aminoacids: the alpha-amino acids, are the building blocks from which proteins are constructed
Follicles: a small tube in skin that hair is made out of
Hair Shaft: something hair is made out of that has Keratin in it
Medulla: part of the hair shaft
Cortex: part of the hair shaft
Cuticle: part of the hair shaft
Aminoacids: the alpha-amino acids, are the building blocks from which proteins are constructed
Photo by ginnerobot
Bibliography
- www.webmd.com/skin-problems-and-treatments/hair-loss/science-hair
- Kids health.org kidshealth.org/htbw/hair.html
Photo by gadl
