All right, y'all. This is Professor McCurdy doing a video here on the sternum. The sternum you can sort of think about in terms of three parts. This top part here, we call that the manubrium. This portion here, we call that the body.
And this right here is the xiphoid process. That's the xiphoid with an X. Where the manubrium connects to the body, we call that the sternal angle. Also in the anubrium, you have a notch here. We call that the suprasternal notch because it is superior to the sternum.
And right next to it, we have the clavicular notches where the clavicle attaches. You notice also in this model, you can see costal cartilages, right? Costal cartilages are, you know, costal meaning having to do with the ribs. These are the rib cartilages.
It's hyaline cartilage that attaches the ribs to the sternum. You'll notice that although we have 12 ribs, there are only 10 costal cartilages, right? Two of the ribs are considered floating ribs because their costal cartilages do not attach to the sternum.
So these other 10 ribs would be considered not floating. I almost said true. Actually, the true ribs are the first seven, right? The first seven are called true ribs because the costal cartilage connects directly.
to the sternum, right? They're also known as vertebro sternal, right? Whereas these three ribs, these are called false ribs because their costal cartilage attaches to another piece of costal cartilage, which then attaches to the sternum.
So they're attached to the sternum indirectly. Those would be false ribs.