Answer:
simple and stratified
Explanation:
Epithelial tissues are spread all over the body which forms the covering of all the body surfaces. Ther are responsible for various functions such as diffusion, protection, sensory reception, absorption and secretion.
The two types of layering recognized in epithelial tissues are simple and stratified
. Simple layer is one layer thick while stratified layer has multiple layers. Simple layer is found in lymph vessels and respiratory system and the stratified layer is found in certain glands and ducts.
Squamous, cuboidal
, and columnar are the three shapes of epithelial tissues and not layering.
Hence, the correct option is "simple and stratified
"
