Peculiarities of Functional Morphology of Erythroid Elements of Hemolymph of the Bivalve Mollusk Anadara inaequivalvis, the Black Sea

摘要

Peculiarities of functional morphology and cytometry of the erythoid elements of hemolymph of the bivalve mollusk Anadara inaequivalvis Bruguiere were studied using method of the light microscopy. Erythrocytes of A. inaequivalvis were shown to be highly specialized cells with high hemoglobin content (180.64 ± 32.51 pg), elevated specific surface (1.558 ± 0.002 μm~(-1)) and functionally low-active nucleus, confirmed by extremely low value of the nucleoplasmic ratio (0.083 ± 0.001). Nucleus of the cell is of insignificant volume (29.93 ± 0.73 μm~3) with high heterochromatin content. Cytoplasm contains granular inclusions, 41.95 ± 2.75 units per cell, which are not constant structures; their presence is connected with functional activity of the cells. When nucleoplasmic ratio is close to 0.04, these inclusions practically are not found. Hemolymph of the mollusk does not contain erythroid elements at early differentiation stages; this fact reflects irregularity of the erythropoietic processes.