An immature form of these cells expresses CD71 on their surface. The function of these non-kidney cells depends on AE1, which exchanges chloride and bicarbonate ions. Reticulocytes must undergo organelle expulsion before maturing into these cells. (10[1])These cells can release ATP when subject to vigorous flow. Decreasing carbon dioxide concentration greatly (10[1])increases (10[1])the (10[1])efficiency (10[1])of these (10[2])cells according to the Bohr effect. These cells assume a biconcave disk shape to allow (10[1])for a high surface-area-to-volume (10[1])ratio to facilitate the diffusion of gasses. For 10 points, name these hemoglobin-rich cells that transport oxygen to tissues through the circulatory system. ■END■