Diffusion - The movement of molecules from a region of higher concentration to a region of lower concentration.
Facilitated diffusion - This process does not require ATP but does require cell membrane proteins which are called carrier proteins to carry the molecules across the cell membrane from an area of higher concentration to an area of lower concentration
Osmosis - is the movement of water through a semipermeable membrane to a higher concentration of solutes.
2 ormore tissues working together can do a lot more. An organis structure made of 2 or more tissues that work together. The heart is made up of 4 types of tissues. The 4 different tissue types work together in the heart as they do in the other organs.