Final answer:
Many layers of flattened epithelial cells are called stratified squamous epithelial tissue, which is adapted for protection from abrasion.
Step-by-step explanation:
Many layers of flattened cells should be termed stratified squamous epithelial tissue. Epithelial tissues are key biological structures that cover the outside of organs and structures in the body, as well as lining the lumens of organs. They are primarily characterized by both cell shapes and the number of cell layers. The term 'stratified' refers to multiple layers of cells, and 'squamous' denotes cells that are flattened and thin. Therefore, when multiple layers of these flat, scale-like cells are present, the epithelial tissue is described as stratified squamous. This type of epithelial tissue is particularly adapted for protection, as it protects underlying tissues from abrasion.