[raisedbyninjas]

AFAICT, biologists didn't screw up and give two different body parts the same name. Neck bones are called cervical vertebrae.

[dotancohen]

I see where you're going with that. The other body part is also a narrow passageway, which in many contexts is called a neck or bottleneck. In my language, we call that other body part "The neck of the womb" צוואר הרחם.