The structure of your hair
The three different layers are the cuticle, which consists of several layers of flat, thin cells. The cortex, which contains the keratin, bundled in a cell-like structure and the medulla a disorganised and open area at the fibre’s centre.
Each layer plays a part in the characteristic of our hair. The medulla is not always present and is an open unstructured region.
The cortex or middle layer of the hair is the primary source of mechanical strength and water uptake. The cortex contains melanin which colours the fibre and determines the colour of your hair, based on the number, distribution and types of melanin granules. The shape of these follicles determines the shape of the cortex and the shape of the fibre relates to how straight or curly your hair is
People with straight hair have round hair fibres, and people with oval and other shaped fibres tend to have more wavy or curly hair.
The cuticle is the outer covering of the hair, its structure slides as the hair swells and is covered with a single molecular layer that makes the hair repel water.
To determine what your hair type is there are various systems that help people classify their curl patterns. It is important to know what your hair type is as it is a good way to know how susceptible to damage your hair is and in turn, how to care for your hair properly.
The is the most widely used system to classify hair. The system shows four categories of hair types, all with subcategories that go into more detail.