Final answer:
Simple epithelium consists of a single layer of cells and can be found in areas where rapid substance transport is needed, such as the alveoli in the lungs. It includes squamous, cuboidal, or columnar cells, with functions including protection, secretion, and absorption.
Step-by-step explanation:
The simple arrangement of cell layers in epithelium is known as simple epithelium. This organization consists of a single layer of cells with varying shapes, such as squamous, cuboidal, or columnar. For example, simple squamous epithelium is found in locations where rapid transport of substances is required, such as in the alveoli of lungs and lining of capillaries.
Meanwhile, cuboidal epithelial cells are typically found in glandular tissues where secretion takes place. Simple epithelium performs various functions including protection, secretion, and absorption, depending on its location in the body.