And these digestive enzymes poke holes inside the membrane of the cancer cell and that lysis and destroys the cell. And then a macrophage can swim by and pick up that remaining debris that essentially came from that lysed cell. Now, what about cytotoxic T cells, also known as killer T cells? So we said that natural killer cells are part of the innate immunity because they destroy in a nonspecific way. They are not looking for any specific cell. They're looking for any abnormal cell, including cancer cells and infected cells.