摘要: Publisher Summary This chapter integrates recent cytophysiological literature on insect haemocytes with earlier work and beyond this diverse general observations cells. The blood cells of insects were first described by Schwammerdam, (1758) who reported that when he opened the abdomen a louse, flowed out containing transparent globules. It is probably presence tracheal rather than corpuscular respiratory system explains paucity in comparison vertebrate blood. Thus, human contains about 5 million microliter, these occupy nearly 50 per cent volume; whereas usually less one hundred thousand microliter. or from representative species six orders are examined detail through electron microscope. These Blattana, Orthoptera, Hemiptera, kpidoptera, Diptera, Coleoptera. nucleus surrounded an envelope composed inner outer unit membranes, space between frequently seen to be continuous cisternae endoplasmic reticulum.