hey everybody what's up this is dr. B we're gonna take a look at the sternum today we're gonna start with on the sternum is we're gonna identify the three main parts of the sternum this area up here is referred to as the manubrium the majority of the sternum we find right here is the body of the sternum and this little point of bone down here is the xiphoid process now at the top of the sternum we can find two notches all right one on either side right here these are going to be the clavicular notches so the clavicle is going to come and rest right there on the sternum you remember in the appendicular skeleton we said the clavicle had a sternal end and a acromial and this is where the sternal end is going to articulate we also see a little line right here this little line right there separating the manubrium from the body that is going to be the sternal angle all right and at the very top up here we would find the super sternal notch okay that's kind of the point that you feel between the two clavicles you'll notice these pieces of cartilage that are attached to the sternum these pieces of cartilage are for the ribs right we call them costal cartilages there are seven true costal cartilages there are three false costal cartilages now we mentioned before when we did when we talked about the thoracic vertebra that we had twelve pair of ribs we're only gonna have ten costal cartilages because two pair of our ribs are referred to as floating ribs okay so those ribs don't come around and attach to the sternum the first seven though like we said are called true costal cartilages the reason they're true is because each rib gets its own individual attachment sight to the sternum ribs eight nine and ten down here are referred to as false gospel cartilages as you can see how those three all come together and they're going to share one attachment point to the this body of the sternum and there you have your sternum and your costal cartilages