I think the correct answer for this would be the veins. Ralph is observing a vein since he notices that the vessel contains blood and<span> which is the function of the veins - to carry blood around the body. Hope this answers the question. Have a nice day.</span>
Cells divide so living things can grow. When organisms grow, it isn't because cells are getting larger. Organisms grow because cells are dividing to produce more and more cells.