The human oviduct, also known as the fallopian tube, is divided into several parts through which the ovum (egg) travels until it meets the sperm for fertilization. These parts include:

1. Infundibulum: The funnel-shaped opening of the fallopian tube located near the ovary. It has finger-like projections called fimbriae that help capture the released egg during ovulation.

2. Ampulla: The widest and longest part of the fallopian tube, located between the infundibulum and the isthmus. It is the usual site for fertilization to occur.

3. Isthmus: The narrowest part of the fallopian tube, adjacent to the uterus.

4. Interstitial (intramural) part: The segment of the fallopian tube that penetrates the uterine wall.

After ovulation, the egg is released from the ovary and captured by the fimbriae of the infundibulum. It then travels through the fallopian tube propelled by ciliary movement and muscular contractions until it reaches the ampulla where fertilization typically occurs. If fertilization occurs, the resulting zygote then travels down the fallopian tube towards the uterus for implantation.

In the human female reproductive system, fimbriae are finger-like projections found at the end of the fallopian tubes, which are also known as uterine tubes or oviducts. The fimbriae are located near the ovaries, extending from the infundibulum of the fallopian tube. Their primary function is to help capture and guide the released egg (oocyte) from the ovary into the fallopian tube.

When an egg is released from one of the ovaries during ovulation, the fimbriae create a sweeping motion to gently coax the egg into the fallopian tube. From there, the egg is transported towards the uterus, where it may be fertilized by sperm if  intercourse has occurred. If fertilization does occur, the resulting embryo will travel down the fallopian tube and implant itself into the lining of the uterus for further development. If fertilization does not occur, the egg is eventually expelled from the body during menstruation.

The human uterus, also known as the womb, is a vital reproductive organ in females where fertilized eggs implant and develop into fetuses during pregnancy. The uterus is composed of three layers: the innermost layer is called the endometrium, the middle layer is the myometrium, and the outer layer is the perimetrium (also known as the serosa). Here, we'll focus on the inner and middle walls:

1. Endometrium:

   • The innermost layer of the uterus is the endometrium. It plays a crucial role in pregnancy by providing a suitable environment for the implantation and nourishment of a fertilized egg (embryo).
   • The endometrium undergoes cyclic changes in response to hormonal fluctuations during the menstrual cycle. These changes include thickening and shedding of the uterine lining, which is responsible for menstruation.
   • If fertilization occurs, the endometrium becomes receptive to the embryo, allowing it to implant and establish pregnancy. It then continues to provide a supportive environment for the developing embryo, forming the maternal part of the placenta for nutrient exchange between mother and fetus.

2. Myometrium:

   • The middle layer of the uterus is the myometrium, consisting of smooth muscle tissue. Its primary function is to contract during labor and childbirth to facilitate the expulsion of the fetus from the uterus.
   • During pregnancy, the myometrium also plays a critical role in maintaining the pregnancy by providing structural support to the growing fetus and participating in the process of labor when it's time for delivery.
   • The myometrium undergoes significant changes during pregnancy, including hypertrophy (increase in muscle mass) and increased contractility near the end of pregnancy to prepare for labor.

Overall, the inner and middle walls of the uterus work in concert to support pregnancy, facilitate embryo implantation, and enable childbirth through the cyclic changes of the endometrium and the contractile function of the myometrium.