Dictionary of Human Evolution and Biology

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Erythrocyte

An enucleated cell or corpuscle in mammals that functions to transport oxygen (bound to hemoglobin molecules) from the lungs to the tissues, and to remove a small portion of carbon dioxide that is carried as HCO3 from the tissues to the lungs. In a normal human adult, 2.5 million erythrocytes are formed every second; each erythrocyte has an average life span of about 120 days. Aka red blood cell.

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From "Dictionary of Nursing and Individual Health Care"