In which structure does the placenta develop?

The placenta develops in the uterus. This structure provides an essential environment for the developing fetus during pregnancy. The uterus has specialized tissue that allows for the implantation of the fertilized egg and the development of the placenta, which is crucial for the exchange of nutrients, gases, and waste products between the mother and the fetus. The vascular nature of the uterine lining facilitates this essential function, ensuring that the developing embryo receives the necessary support to grow and thrive.

In contrast, the other options are not suitable for placenta development. The oviduct is the site where fertilization occurs but is not designed for supporting a fetus. The ovary produces eggs and hormones, but it is not involved in the implantation and nurturing of the embryo. The cervix serves as the passage between the uterus and the vagina and plays a role during childbirth, but it does not support the development of the placenta. Hence, the uterus is the only correct answer for where the placenta develops.