Isthmus

Definition

In the context of the ovarian reproductive system, the isthmus is a narrow portion of the fallopian tube that connects the ampulla and the uterine cavity. It plays a critical role in guiding the egg from the ovary to the uterus.

Related terms

Fallopian Tubes: These are paired tubes that transport eggs from the ovaries to the uterus and are vital for fertilization.

Ampulla: The ampulla is a wider section of the fallopian tube where fertilization often occurs.

Uterine Cavity: This is the internal part of the uterus where an embryo implants and grows during pregnancy