A pair of fallopian tubes are found in a female mammal and down either of these tubes eggs will travel from the ovary to the uterus. They are located in the pelvic cavity and extend laterally from the corners of the uterus. They are also lined with cilia which cause the eggs to move as they are not motile. Infection of a fallopian tube can cause scar tissue to form and block the tube, partially or fully preventing any movement through them. Summation of the fallopian tubes is referred to as the ampulla. It generally the site where an egg is fertilized by a male's sperm. The resulting fertilized egg then moves to the uterus where it continues to develop until birth.
They play an active role in fertilisation. The smooth muscle tissue in the fimbriae respond to the changing levels of female sex hormones and produce slow, steady contractions which result in the sweeping of the surface of the ovary by the fimbriae.