Hair Facts

Hair Facts
Hair is a protein strand that extends from a hair follicle beneath the skin and is a defining characteristic of mammals. Every hair strand is made up of three regions - the medulla, the cortex, and the cuticle. The medulla is the innermost layer, the cortex is the middle layer, and the cuticle is the outer layer, or covering. The color of hair is determined by hair pigments produced in the hair follicle. On humans hair can grow everywhere on the body except for areas such as the soles of the feet, the lips, and the palms of the hands, as well as on mucous membranes. On the human body there are also different types of hair including androgenic hair and vellus hair. Texture can also vary and some hair is curly while other hair is straight.
Interesting Hair Facts:
Hair is mostly comprised of keratin, a type of protein. This protein is also the same type that makes up beaks, feathers, claws, hooves, and the horns of animals.
Your hair should grow faster in the warm weather as the heat increases circulation and hair is able to grow faster.
The only hair on the strand that is not dead is the hair still inside the scalp's epidermis.
Hair is commonly used for forensic investigations. Hair can tell a forensic scientist almost anything that has been in a person's blood stream, including drugs and other chemicals. Hair can't tell a forensic scientist if the hair came from a man or woman though.
The most common hair color is black. Only 2% of the population worldwide has blonde hair and only 1% of the world's population has red hair.
People with blonde hair end to have more hair strands on average while people with red hair tend to have the least, on average.
Trichoptilosis is the scientific term for split ends.
The fastest growing tissue in the body is bone marrow. Hair comes in second. Facial hair is the fastest growing hair on the human body.
In order to notice when a person begins to bald they must have lost approximately 50% of their hair on their head.
The human head lacks the insulation of fat that most other parts of the body have. Hair provides insulation for the head. It helps to keep it warm and to cool it down.
Hair is so strong it is estimated that the hair on one person's head could support the weight of two elephants. The scalp wouldn't though.
Vellus hair is the type of hair that covers much of the human body. It is very fine and sometimes barely noticeable.
Androgenic hair is the type of hair that grows on the head, in the armpits, on the chest, and other parts of the body.
Eyelashes are a type of hair that protects the eyes from dust and other particles that could damage them.
One strand of hair lasts about 2 to 7 years, and goes through three phases - the anagen phase, the catagen phase, and the telogen phase.
Each day a person loses between 50 and 100 strands of hair. That's why your brush is always so full of hair!

Related Links:
Facts
Human Body Facts
Animals Facts
Human Body
Human Body Diagram
Human Body Vocabulary Games
Gorilla Facts
Madam CJ Walker Timeline
Hair Design Quiz
Madam CJ Walker Timeline
Electrical Energy to Thermal Energy Conversions Examples
The Skin Facts
Cockroach Facts
Baboon Facts
Agouti Facts
Gorilla Facts