 Hey everybody, Dr. O here. This video we're going to cover your pectoral girdle or the bones that attach your upper arm or your arm to your axial skeleton. We have the clavicle and the scapula. Here's the clavicle. Not much to look at here. We have the sternal end, which is where the clavicle attaches to your sternum. And the acromial end, which is going to be part of the acromioclavicular joint that connects your clavicle and your scapula. Finally here, a few more things to note. We have, looking at the anterior surface, we see the coracoid process. That's going to be an important attachment point for your pectoralis minor muscles. That's the coracoid process. Then behind it, you have the acromion, also known as the acromio process. And that's going to be where that acromioclavicular joint is going to be between your clavicle and your scapula. If anyone's ever, if you ever see an AC joint sprain, you can see a little bump on someone's shoulder where if that ligament hasn't healed correctly. That's the coracoid process and the acromio process or the acromion. Then on the side, on the edge, we see the glenoid cavity. I call this the glenoid fossa. That's the socket of the ball and socket joint that makes up your gleno-humeral joint or your shoulder. Then we have, as far as on the backside, you see the spine. The spine is that narrow ridge of bone. Reason that's important is because right above it, we have the supraspinatus muscle. And right below it, we have the infraspinatus muscle. Those are two of your rotator cuff muscles. So the spine separates the supraspinatus and infraspinatus muscles, which we'll learn in the next unit. So that's going to be your clavicle and scapula. Not a lot to know there. I hope this helps. Have a wonderful day. Be blessed.