A low red blood cell count means cells in the body are not receiving enough oxygen. Anemia is the most common cause for an abnormally low amount of red blood cells, affecting 3.5 million Americans, as reported by WebMD. More »

A low white blood cell count, called leukopenia, could point to an autoimmune disorder. A low white blood cell count could also be caused by other factors. More »

www.reference.com Health Medical Ranges & Levels

A low white blood cell count, called leukopenia, may indicate bone marrow problems, autoimmune disorders, diseases involving the liver or spleen, certain cancers, or certain illnesses caused by viruses, states MedlinePlu... More »

www.reference.com Health Medical Ranges & Levels

A normal red blood cell count for males is 4.7 to 6.1 million cells per microliter, and a normal count for females is 4.2 to 5.4 million cells per microliter, states MedlinePlus. Normal ranges may vary from lab to lab, a... More »

Oxygen attaches to hemoglobin in the blood that carries it to other tissues, so when the red blood cell count is low, the blood oxygen levels also drop. When a person does not have enough healthy red blood cells, he is a... More »

For a cancer patient, a high red blood cell count can mean that the cancer has spread to the kidneys, resulting in renal cell carcinoma, explains Healthline. However, it can also indicate that an individual is merely deh... More »

The main causes of low red blood cell count are blood loss, decreased or faulty production and destruction of red blood cells by the body. According to the University of Maryland Medical Center, the alternative treatment... More »

www.reference.com Health Medical Ranges & Levels