CIL:39043, Drosophila melanogaster, egg, invertebrate nurse cell. In Cell Image Library

This fluorescent micrograph shows the developing egg chambers within the Drosophila melanogaster (fruit fly) ovary. The egg chambers house the maturing eggs - these are the cells at the tips of the egg chambers that face towards the outside of the image. The other cells present are called nurse cells; they occupy the rest of the chamber and assist the developing egg cells as they increase in size over time to produce a mature egg. The specimen has been stained with phalloidin, which marks the actin in the cells green and a nuclear marker that highlights the nuclei in red.