Rapid hair growth for woman with prenatal vitamins

Resource for Rapid hair growth for woman with prenatal vitamins and fun search portal . Continue for our current list for the Rapid hair growth for woman with prenatal vitamins

Love Poems, Love Calculator

Arts And Entertainment

Health And Fitness

Home Based Business

Self Improvement

Dating, Love, Sexuality

Relationships

Funny Pictures

MSN Nick Names,Display Pictures,Emoticons,Background

Hair is a biological polymer; over 90% of its dry weight is made up of proteins called keratins. Under normal conditions, human hair contains around 10% water, which modifies its mechanical properties considerably. Hair proteins are held together by disulfide bonds, from the amino acid cysteine. These links are very robust; for example, virtually intact hair has been recovered from ancient Egyptian tombs. Different parts of the hair have different cysteine levels, leading to harder or softer material.

On most adult humans there are two main types of hair: terminal hair, and vellus hair. A third type, lanugo hair, is present in the fetus, and some newborn babies.

The speed of growth is roughly 10 cm/yr = 0.3 mm/day = 3 nm/s. The cells at the base of the hair follicle divide and grow extremely rapidly. This is why people under chemotherapy sometimes lose their hair; the treatment targets any rapidly-dividing cell, not just the cancerous ones.