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www.reference.com/science/red-blood-cells-76cc71f6ea4d6f67

Red blood cells carry oxygen and nutrients to the tissues in the body and take away carbon dioxide. They are also called erythrocytes. They get their red color from a pigment called hemoglobin, and it is the hemoglobin that actually carries the oxygen and carbon dioxide...

www.reference.com/science/red-blood-cells-specialized-82bbe77037c57d32

According to Springfield Technical Community College, the primary role red blood cells play in the body is to transport oxygen from the lungs to the various body tissues. To carry out this task, the cells are filled with a substance called hemoglobin. Hemoglobin is so i...

www.reference.com/article/large-red-blood-cells-symptom-cancer-fa5d81e07c36fdfc

Large red blood cells, called macrocytosis, are not a cancer symptom but may signal a problem that needs to be examined medically, explains Mayo Clinic. Macrocytosis is not a disease and does not produce symptoms or signs. Vitamin B-12 or folate deficiencies, liver dise...

www.reference.com/article/long-red-blood-cells-live-f32452136131161a

A normal red blood cell lives for about 120 days. It takes about two days for the body to manufacture each red blood cell, and about two million are turned out every second. Production of new red blood cells occurs in the bone marrow.

www.reference.com/science/causes-red-blood-cells-small-size-38a469ff4fc45823

Microcytic anemia is the condition wherein red blood cells are smaller than normal, and it is primarily caused by iron deficiency anemia and thalassemia, according to Dr. Siamak T. Nabili writing for eMedicineHealth. Iron deficiency anemia occurs due to limited or inade...

www.reference.com/article/should-red-blood-cells-urine-bdd75b62841276db

It is normal for there to be a very small number of red blood cells in urine, according to MedlinePlus. However, the exact amount that counts as normal may differ, depending on the laboratory that performs the test.

www.reference.com/article/causes-high-red-blood-cell-count-6720c67fa5e3ffa1

Genetic mutations, both inherited and acquired, are one primary cause of high red blood cell counts, also known as polycythemia, says MedicineNet. Sleep apnea and tumors are secondary causes of polycythemia.