Answer:
My answer is:
Flat cells, such as skin cells, often join in or overlap to cover a surface. They
work something like the shingles on a building's roof. Your skin is built of many
layers of flat cells, making it both strong and flexible. Flat cells are found lining
many different parts of the body. For example, they line the surfaces of the
mouth.
by:a smart 5th grader^^