The Basics of Hair

Hair is an integral part of the human body. It is the most visible external part of the body. However, hair does not grow on the palms of the hands or the soles of the feet. It is most noticeable on a few areas, such as the face, eyebrows, armpits, and pubic area. It is also an important secondary sex characteristic, with male hair being thicker and more visible than female hair.


Hair is made of a protein filament called alpha-keratin, which grows from follicles in the dermis. It is a unique biomaterial, containing a wide variety of properties. It is comprised of alpha-keratin, a chemical compound that has several beneficial properties. This material is found in every human being. This means that the hair shafts of animals and humans are made up of the same chemical, so they are able to recognize one another.

While hair is made up of different contributing factors, protein is the most important. It is composed of several layers, including the cuticle, cortex, and medulla. The cuticle consists of flat, square cells that attach to the cortex cells and move upward. The cuticle contributes to the anchorage of the follicle and facilitates the removal of dirt. The cuticle also provides a barrier to chemical and physical insults.

In mammals, hair is 95% keratin, a helicoidal protein found in all appendages and skin. It is insoluble in water and ensures that the hair remains impermeable. The cuticle is made up of 18 amino acids, including cysteine. The cysteine in the cuticle creates disulfide bonds between molecules, which adds rigidity and resistance. The follicles of hair are located in the dermis.

The cortex of the hair contains millions of polypeptide chains that are interconnected. Each strand of hair contains about one hundred million of these chains. The cuticle is the innermost layer of the shaft. The cortex makes up the outer layer and contains much of the melanin that gives the color. The follicle is the structure where hair grows. There is a bulb at the base of the scalp and a suprabulbar region in the upper. The two are connected by a specialized system, called the follicle.

The cortex is the most common part of the hair. It consists of three layers: the cortex, the medulla, and the cuticle cells. The medulla contains the most melanin in the follicle, which is responsible for the color of the hair. The medulla is the most superficial layer of the hair and is located at the base of the follicle. The medulla contains the most keratin.

The outer layer of hair, the cuticle, is the main component of the hair. Its nourishing portion is the cortex. The cuticle is made of keratinized cells that are 60 micrometers long and six micrometers wide. In addition to the cortex, the other part of the hair, the cortex, is the main component of the hair. The follicle contains long keratin chains that make up the follicle.