The term 'SCALP STRAND' refers to a single strand of HAIR. It is the smallest unit of HAIR, and is composed of a shaft, root, and follicle. The shaft is the visible part of the HAIR, while the root is embedded in the scalp and the follicle is the structure that produces new HAIR cells. HAIR strands are made up of proteins, lipids, and other components, and they provide protection from the environment and help regulate body temperature.