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| Simple Squamous Epithelium |
Simple squamous epithelium consists of a single layer of thin, flattened cells. These cells fit tightly together, somewhat like floor tiles, and their nuclei are usually broad and thin. As a rule, substances pass rather easily through this type of tissue, and it often occurs where diffusion and filtration are taking place. For instance, simple squamous epithelium lines the air sacs of the lungs where oxygen and carbon dioxide are exchanged.
It also forms the walls of capillaries, lines the insides of blood and lymph vessels, and covers the membranes that line body cavities.
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