초파리(Drosophila melanogaster)의 마지막 유충에서 혈액을 채취하여 미세구조를 관찰하였다. Prohemocyte는 가장 미분화된 상태였고, Plasmatocyte는 보다 분화된 상태이며 어느 정도 풍부한 소기관을 가졌다. Granular 세포는 세포질내에 여러 형태의 과립을 가지는 것이 특징이고 특히 lysosome이 발달하였다. Crystal 세포내에는 커다란 crystal이 수개씩 존재하며 free ribosome이 충만되어 있다. Oenocytoid에는 과립상은 거의 없으며 mitochondria와 Golgicomplex가 발달하였다.
The hemocytes of Drosophila melanogaster were observed with electron microscope, and five types of the cells were identified; prohemocyte, plasmatocyte, granular cell, crystal cell and oenocytoid, accounting for about 5%, 35%, 45%, 10%, 5% respectively of total cell numbers. Prohemocytes are characterized by a low concentration of intracellular organelles. Plasmatocytes are spindle or oval in shape and have relatively plenty of organelles and lysosomes. Granullar cells are the most polymorphic. They have numerous pseudopod-like projections and contain various granules and inclusions. In this cell type, intracellular organelles are fully developed. Crystal cells are characterized by numerous crystals composed of fine granules arranged regularly. Oenocytoids are the largest one among all cell types and contain relatively developed organelles.
