This type of tissue is associated with diffusion of water, electrolytes, gases, etc. it lines the body's outer surface and internal organs and cavities. it lacks blood vessels.

The correct answer is epithelial tissue.

There are different types of epithelial tissue depending on the type of cells its made of: squamous, columnar, and cuboidal. It can also be divided into simple and stratified depending on the number of layers. Functions of epithelial cells are wide such as secretion, absorption, protection ...