during diffusion, how do the molecules physically get from one place to the other?(spaceship tractor beam? wiged monkeys?)

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

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