Step two of a six-step sequence of the death of a cancer cell (green). A buffy coat containing red blood cells, lymphocytes (orange) and macrophages (purple) is added to the bottom of the membrane. A group of macrophages identify the cancer cell as foreign matter and start to stick to the cancer cell, which still has its spikes. Photo magnification: 4000x. Full sequence: BJ4579, BS9471, BS9472, BS9473, BS9474, BS9475.