06 Drosophila melanogater Mating
Drosophila melanogaster mating

The 133 proteins from the accessory glands, ejaculatory duct, and ejaculatory bulb are transferred along with sperm and seminal fluid to females during mating and effect profound changes in female behavior and physiology.

(Photo credit T. Chapman in PLoS Biology; Vol. 6, No. 7, e179; July 29, 2008.)