The Drosophila female reproductive tract (figure adapted from Middleton et al., 2006). The mature egg is transported through the oviduct during ovulation and is fertilized by sperm stored in the spermathecae and seminal receptacle (the latter is not shown). The spermathecae and the accessory glands (parovaria) are the major secretory components of the female reproductive system. Sun and Spradling (2013) show that glandular secretions from these structures regulate ovulation and promote sperm storage. The innervation of muscles is shown in magenta. Scale bar: ∼250 μm.
IMAGE: Middleton et al. (2006).