Drosophila ovarioles offer a sequential view of nurse cell phagocytosis. (A) The Drosophila ovary is composed of ovarioles, which are strings of progressively developed egg chambers. (B) Schematic view of nurse cell engulfment by stretch cells during Stages 11 (B), 13 (B'), and 14 (B") of egg chamber development. (C) Summary of molecular mechanisms regulating nurse cell phagocytosis by stretch follicle cells.