Special Note: This article departs from my normal style, but I have included it here because the subject of hair styles and hair types is popular. Blonde jokes have done their share to contribute to the general interest in hair types. This article focuses on some of the interesting scientific facts about hair.
"A blonde was cruising down the highway at breakneck speed when a cop pulled her over.
'May I see your license and registration, please?' asked the cop.
Miffed, the blonde said, 'I wish you guys would get your act together. Just yesterday you took away my license. Now today you want me to show it to you!'" ~blondejokes.com
What makes blonde people blonde or curly-haired people curly-haired? Genetics would likely be your answer. So then, what makes blonde hair blonde or black hair black? And, what exactly is hair composed of and how does it grow? We will attempt to answer all these questions and more in this article on the subject of hair.
So, what makes straight hair straight and curly hair curly? The type of hair one has depends on the shape of the cross-section of their hair shafts. Imagine that a hair shaft is the size of a telephone pole. Say that we have a straight hair shaft. When we chop it in half and look at the cross section, we see a circle. When we chop a wavy hair shaft in half, the cross section is oval-shaped. Looking again at our enlarged hair shaft, we notice that it appears black and shiny in the sunlight. When we bring it into the shade, it no longer has a sheen. Why is this and what gives hair its color?