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www.reference.com/article/blood-red-296fb8cb15832643

Humans have red blood because it contains iron. Another way of explaining why humans have red blood is that the color is due to hemoglobin, which is the protein associated with iron that makes blood red.

www.reference.com/science/blood-red-a013fbe0a40879d5

The red color of blood comes from the hemoglobin that makes up the majority of the mass of the cell, which allows the blood cell to carry oxygen around the body. The plasma itself is a straw color when viewed under a microscope, but the hemoglobin makes up so much of the blood cell that its red colo

www.reference.com/world-view/high-red-blood-cell-count-mean-3a50868f74809f2e

An elevated red blood cell count is associated with dehydration, congenital heart disease, kidney tumors, bone marrow diseases and scarring of the lungs, reports MedlinePlus. Red blood cells contain hemoglobin, a protein that transports oxygen.

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/red-blood-cells-show-up-urine-19161107a2e53a48

Red blood cells may show up in urine due to kidney stones and tumor, states MedicineNet. These cells can enter the urine from the trauma of bladder catheterization or from the vagina during menstruation.

www.reference.com/article/human-body-build-red-blood-cells-54399969249c40e

The human body builds red blood cells through the mediation of a protein called erythropoietin, claims the American Society of Hematology. This protein is made largely in the kidneys.

www.reference.com/science/red-blood-cell-adapted-99c28c8eff1730a9

Two adaptations that have been made by the red blood cell are the lack of a nucleus and organelles, or small, specialized bodies in the cell. This allows for more room in the blood cell for hemoglobin.

www.reference.com/world-view/symptoms-having-low-red-blood-cell-count-4ab6d8840afc1142

A low red blood cell count, most often referred to as anemia, can cause weakness, fatigue, dizziness, fainting, lack of energy, pale skin, rapid heart rate or palpitations and shortness of breath. Chronic anemia in children may cause learning problems and increased risk of infection, says MedicineNe

www.reference.com/world-view/causes-red-blood-cell-count-low-b45af9f8b346c56b

One cause of low red blood cell count is pregnancy, but this is normal, according to Mayo Clinic. However, among the many other conditions and diseases that can cause a low red blood cell count are cancer, aplastic, vitamin-deficiency and iron-deficiency anemia, internal or external bleeding and por

www.reference.com/world-view/causes-increase-red-blood-cell-count-a74078ce13ecdfcd

Several medical conditions ヨ dehydration, cigarette smoking and certain medications ヨ may cause high red blood cell counts, according to MedlinePlus. To intentionally increase low red blood cell counts as treatment for anemic patients, options include vitamin and mineral supplementation, blood trans