 So we had our lungs, and now what you have to remember is that you are now inside the lungs, but we're just breaking it down and looking at the tubing. So there's tissue and puff and fluff all around these tubes that we're about to talk about. Do you remember the name of that tube right there? That's your trachea. Trachea, it bifurcates splits into two pieces into two primary bronchi. Now, your book calls them main bronchi. I can handle main bronchi. If you want to call them main bronchi, more power to you. I think what you'll see is that the main bronchi, the next layers, my way is easier. Each primary bronchus. Here are my primary bronchies. One branches into the left lung, one branches into the right lung. Done. Now, we have secondary bronchi. So each primary bronchus branches into secondary bronchi, and the secondary bronchi feed a lobe. Did you follow what I just said? So here comes a primary bronchus, branches into three secondary bronchi or two secondary bronchi. Here's an awesome question. I could show you a picture of primary bronchi, secondary bronchies, and say which lung is this from. And you should know that the secondary, if we only have two secondary bronchi, it means we only have two lobes of our lung, which means we must be on the left side. It must be the left lung. It must be the left secondary bronchus. And then our tertiary bronchies. Yeah, that's what they're called. Here were my secondaries. Secondaries are blue. Tertiary look like they're yellow. And there is like an anatomical thing that tertiary bronchi feed into that we don't have to know. And then there's a whole bunch more bronchies or bronchi bifurcations that happen inside the lung tissue. But the thing that connects them all is the magical hyaline cartilage. If you are in, if you see hyaline cartilage or you feel hyaline cartilage, you are palpating a bronchus of some flavor. Whether it be a primary, a secondary, or a tertiary, bronchus, because the next thing that we're going to talk about does not have...