A blood cell disorder is a condition in which there’s a problem with your red blood cells white blood cells or the smaller circulating cells called platelets they are critical for clot formation all of these three cell types form in the bone marrow which is the soft tissue inside your bones Red blood cells transport oxygen to your body’s organs and tissues White blood cells help your body fight infections platelets help your blood to clot Blood cell disorders impair the formation and function of one or more of these types of blood cells :)