How do materials move through the cell membrane in facilitated diffusion

With the help of membrane proteins

Explanation:

In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers. A concentration gradient exists for these molecules, so they have the potential to diffuse into or out of the cell by moving down it.

age range would be the answer

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;