What is the name of the organ that is made up of c-shaped cartilaginous rings?

The organ that is made up of C-shaped cartilaginous rings is called the trachea. Here are the steps to answer this question:

1. Understand the question: The question is asking for the name of an organ in the human body that is made up of C-shaped cartilaginous rings.

2. Recall knowledge: From biology, we know that the respiratory system contains an organ that fits this description.

3. Identify the organ: The trachea, also known as the windpipe, is a tube that connects the pharynx and larynx to the lungs, allowing the passage of air. It is reinforced by C-shaped rings of cartilage that prevent it from collapsing.

So, the answer to the question is the trachea.