Final answer:
Reticulocytes are large immature RBCs that contain bluish cytoplasm and reticular precipitates due to remnants of organelles. The bluish color and reticular precipitates are characteristic features of reticulocytes and serve as a marker for assessing the rate of RBC production.
Step-by-step explanation:
Reticulocytes are large immature red blood cells (RBCs) that contain bluish cytoplasm and reticular precipitates due to the remnants of organelles such as networks of ribosomes.
These organelles are shed as the reticulocytes mature into circulating erythrocytes, which have few internal cellular structural components.
The bluish color and reticular precipitates are characteristic features of reticulocytes and serve as a marker for assessing the rate of RBC production.