The second way is via the space between the cells the intercellular collects. Now, another method by which things actually are transported is via the cell membrane of these endothelial cells. So notice we have the nucleus showed in purple. We have the cell membrane, and just like anything else can travel across any other cell membrane, these cells can also actually transport things across the cell membrane. Now, the final method by which we can exchange nutrients and waste products is via the process of pinocytosis. So this is simply when some type of molecule approaches the membrane of the cell, the cell essentially invaginates, and it takes in that nutrients into our body and it creates a vesicle inside the cytoplasm that contains that nutrient.