The oval or round and loosely arranged mesophyll cells situated below elongated compactly placed green cells arranged vertically and parallel to each other in dorsiventral leaf is

The oval or round and loosely arranged mesophyll cells situated below elongated cells, which are arranged vertically and parallel to each other in dorsiventral leaf are Spongy parenchyma which are abaxially placed. There are numerous large spaces and air cavities between these cells.