 Well, let's talk about, I think this is a funny question, but what is a thyroid? Have you ever seen one? Yes, actually I have. I've seen operations on that. Well, they're kind of pinkish and they look like the pictures. You can actually bring up pictures and show it. But the thyroid is part of the endocrine system. In the endocrine system, there are two systems that control the rest of the body. The nervous system.