Expanded Proximal Part of Oviduct in Female
The expanded proximal part of the oviduct in a female is known as the fimbriated funnel. This structure plays a crucial role in the reproductive system of females by facilitating the movement of the egg from the ovary to the oviduct for fertilization.
Explanation
The fimbriated funnel is located at the end of the fallopian tube, closest to the ovary. It consists of finger-like projections called fimbriae, which extend towards the ovary.
The main function of the fimbriated funnel is to capture the mature egg (ovum) that is released from the ovary during ovulation. The fimbriae sweep over the surface of the ovary, creating a gentle current that guides the egg into the fallopian tube.
Once the egg is captured by the fimbriated funnel, it is transported through the fallopian tube towards the uterus. The walls of the fallopian tube have cilia and smooth muscle, which help in the movement of the egg through peristalsis.
During this journey, if the egg encounters sperm, fertilization can occur in the fallopian tube. The fertilized egg, now called a zygote, continues its movement towards the uterus where it implants and develops into a fetus.
In summary, the expanded proximal part of the oviduct in a female is the fimbriated funnel. It plays a vital role in capturing the egg released during ovulation and guiding it into the fallopian tube for fertilization.