Circulating hemocytes (TEM).

<p><b>(A)</b> Hyalinocyte with an eccentric nucleus, numerous SER vesicles, mitochondria and L granules; a few profiles of the RER are also seen. <b>(B)</b> Agranulocyte with a round central nucleus, SER vesicles and RER cisternae, as well as some mitochondria. <b>(C)</b> Granulocyte, showing a displaced, bean-shaped nucleus and numerous R granules; some SER vesicles are also seen. <b>(D)</b> Pro-granulocyte, showing a bean-shaped nucleus, a Golgi complex and numerous immature R granules of varying electron density; some SER vesicles and extended RER cisternae are also seen. Abbreviations: <i>gol</i>, Golgi complex; <i>Lgr</i>, L granules; <i>mit</i>, mitochondria; <i>n</i>, nucleus; r, immature R granules; <i>Rgr</i>, mature R granules; <i>rer</i>, RER cisternae; <i>ser</i>, SER vesicles. Scale bars represent 1 μm.