The respiratory membrane is composed of two extremely thin layers of simple squamous epithelium. Explain how the structure of the respiratory membrane allows its function.

The functions of epithelial cells ranges from secretion, sensing, selective absorption, protection, and transcellular transport,

but these epithelial layers contain no blood vessels, and then they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane.

a

explanation:

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.