Here's why:
* Epithelial tissue classification: Epithelial tissues are classified based on cell shape (squamous, cuboidal, columnar) and the number of layers (simple, stratified).
* Stratified squamous epithelium: While stratified squamous epithelium has multiple layers of cells, the number of layers can vary significantly depending on the location and function of the tissue.
* Function: The number of layers in stratified squamous epithelium is related to its function. The more layers, the thicker and more protective the tissue.
Instead of focusing on the exact number of layers, it's more important to consider the function and location of the tissue. For example:
* Stratified squamous epithelium (keratinized): Found in the skin, it has many layers and is highly protective against abrasion and water loss.
* Stratified squamous epithelium (non-keratinized): Found in the mouth, esophagus, and vagina, it has fewer layers and provides protection and lubrication.
In summary: There is no specific name for a tissue with 20 layers of flat cells. You would need to consider the function and location of the tissue to determine its specific type.
