**Core Concept**
The fallopian tubes are a pair of narrow tubes that connect the ovaries to the uterus in females, facilitating the transport of ova from the ovaries to the uterus for fertilization. The correct identification of the part of the fallopian tube from the ovary to the uterus is crucial for understanding the anatomy of the female reproductive system.

**Why the Correct Answer is Right**
The correct answer is the **ampulla**, which is the widest portion of the fallopian tube. It is located near the junction of the fallopian tube with the ovary and is where fertilization typically occurs. The ampulla is a muscular, widened section that allows for the storage and fertilization of ova. It is also the site where the fertilized ovum undergoes cleavage and begins to develop into a blastocyst.

**Why Each Wrong Option is Incorrect**
* **Option A:** The **infundibulum** is the funnel-shaped end of the fallopian tube nearest the ovary, which contains fimbriae that help to capture the ovulated ovum. It is not the part of the tube from the ovary to the uterus.
* **Option B:** The **isthmus** is the narrow portion of the fallopian tube that connects the ampulla to the intramural portion. It is not the part of the tube from the ovary to the uterus.
* **Option C:** The **intramural** portion of the fallopian tube is the part that passes through the uterine wall. It is not the part of the tube from the ovary to the uterus.

**Clinical Pearl / High-Yield Fact**
The fallopian tubes are a common site for ectopic pregnancies, which occur when a fertilized ovum implants outside the uterus. The ampulla is the most common site for ectopic pregnancies, and symptoms may include abdominal pain, vaginal bleeding, and amenorrhea.

**Correct Answer:** C.