 The words "hemolysis" () and "hematolysis" () both use combining forms conveying the idea of "lysis of blood" ("hemo-" or "hemato-" + "-lysis").The words "erythrolysis" () and "erythrocytolysis" () both use combining forms conveying the idea of "lysis of erythrocytes" ("erythro-" ± "cyto-" + "-lysis").Red blood cells (erythrocytes) have a short lifespan (approximately 120 days), and old (senescent) cells are constantly removed and replaced with new ones via erythropoiesis.