Answer: The largest layer of the human hair is the CORTEX.
The human hair is made up of a protein known as keratin.
It has basically 3 parts/layers; The Cortex,the Curticle and the Medulla.
Explanation: The cortex of the hair shaft is one of the 3 layers of the human hair.it is the thickest layer and lies between the hair curticle and the medulla.
The cortex is the part of the hair that contains most of the pigments found in the hair and on the skin too that gives the hair it's color.
The cortex is protein rich and it is found around the Medulla,the texture, color and thickness of the cortex varies, based on the distribution of the cortex,it is ascertained from which Individual a human hair may have come from however,when examined with a microscope,there is more precise revelation of the shape and condition of the root and tip of the hair.
