Answer:
a.epithelial; irregularly is a correct option.
Step-by-step explanation:
- Squamous cell is a type of a epithelial tissue which is present in the tissue which forms the upper layer of the skin, they are flat cells and irregular in shape that make epidermis.
- The function of Squamous cells is to provide a protective surface that helps from the external environment.
- They play an important role in the process of diffusion, filtration and in osmosis.