What makes up a Rottweiler hair shaft?
The hair shaft is divided into medulla, cortex, and cuticle. The medulla is the innermost region of the hair and could be considered the ‘marrow’ of the hair shaft. The medulla is composed of longitudinal rows of cells flattened from top to bottom. The cell layers are solid near the hair root, but the rest of the hair shaft contains air and carbohydrate pockets. The cortex, the middle layer, consists of completely cornified, spindle-shaped cells, whose longitudinal axis is parallel to the hair shaft. This layer gives the hair its strength and elasticity and is made up of a fibrous substance formed by elongated cells. These cells contain the pigment that gives the hair its colour. The colour of a hair depends on the type and amount of pigment granules it contains. These pigment granules are formed in the melanocytes (pigment producing cells) of the hair follicle, are found to be oval fairly smooth particles, and are injected into the hair cells as they grow. Black hairs found in the Rot
