Final answer:
The posterior end of each oviduct enlarges into the infundibulum, which is the wide distal end of the oviduct with finger-like projections called fimbriae.
Step-by-step explanation:
The posterior end of each oviduct enlarges into the infundibulum. The infundibulum is the wide distal end of the oviduct that flares out and has finger-like projections called fimbriae. The fimbriae help the egg enter the oviduct after ovulation.