Ultrastructure of zebrafish hematopoietic tissue.

(A-D) Electron micrographs of myeloid cells in the zebrafish kidney at low (A) and high (B-D) magnifications. (C) Zebrafish neutrophil with round cytoplasmic granules (white arrowhead) and elongated granules with paracrystalline inclusions (black arrowhead). (D) Mature zebrafish basophil/eosinophil. T = renal tubule; PM = promyelocyte; My = myelocyte; N = neutrophil. (A) 1400 ×; (B) 7500 ×; (C) 15 750 ×; (D) 23 500 ×.