Are the cartilage rings visible in the trachea and bronchi?

The best answer to the question: Are the cartilage rings visible in the trachea and bronchi, would be: yes.

Explanation:

Both the larynx, trachea and bronchi, with the exception of the tertiary bronchi that already branch into the lungs themselves, have visible, white-like, cartilaginous rings that give them support, and protect them from impact. These rings, from the trachea, to the bronchi, can be seen as successive ring-like downwards structures that surround the softer muscular tubes. They are made of cartilage because these structures need flexibility and easiness of expansion. But they can be seen.