Unformatted text preview: and other organelles and is called a reticulocyte . Reticulocytes leave the bone marrow and circulate in the blood; within a day or two, the reticular network disintegrates and the cell is a mature erythrocyte. Normally, about 1% of circulating red blood cells are reticulocytes, but that percentage can increase after hemorrhage. Erythrocytes Erythrocytes are disc-shaped cells with thick rims and a biconcave shape. (See Figure 3). The loss of organelles during maturation significantly increases the surface area/volume ratio and thus the diffusion rate of substances into and out of the cell. The major function of RBCs is gas transport, primarily oxygen and carbon dioxide . The major protein within RBCs is hemoglobin . Carbonic anhydrase is also found in the cytoplasm of RBCs; this enzyme plays a significant role in regulating pH homeostasis. Figure 3...
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- Fall '10
- Anatomy, Bone marrow, red bone marrow, synthesize large quantities