Brain tissue is composed of two main types of cells: neurons and glial cells. Tela is the Latin word for a thin layer or sheet, and it is used to describe the thin layers of neurons and glial cells that make up the brain tissue. SCAR is an acronym for Substantia Cinerea Araneosa, which is a type of glial cell found in the brain. These cells are responsible for providing structural support and insulation for the neurons. Together, these two types of cells form the brain tissue, which is essential for the functioning of the nervous system.