 Hey everybody, Dr. O here. Let's talk about the humerus. I would try to insert an anatomy joke here but I know it wouldn't be humerus. Buh-dunk-bunk. Alright. Sorry. My bad. So the humerus. Let's talk about the key parts of the humerus. Let's start with, so you see the head of the humerus. That's going to be the ball for the ball and socket joint of the glenohumeral or shoulder joint. Then we see the greater and lesser tubercles. Those are going to be important muscle attachment points there. The deltoid tuberosity down the length of the, the shaft of the humerus a little bit there. The insertion point for the deltoids. That's the deltoid tuberosity. Then on the bottom we have the trochlea and the capitulum. Those are going to be the condyles of the humerus. So they're going to be called the condyles on the femur but here in the humerus they have their own names. Capitulum, which basically means head shaped and trochlea which means pulley. So those would be the condyles of the humerus. The reason I say that is because right above that we have the medial and lateral epicondyles. You might, if epicondyle means above or around the condyles you might be thinking where's the condyles? That's going to be the capitulum and the trochlea. So we said the greater and lesser tubercles, deltoid tuberosity is important there. Capitulum and trochlea being the condyles of the humerus. Medial and lateral epicondyles there. Now we have a couple of fossa. So these indentations, the alecranon fossa will be on the back of the humerus. That's going to be where the alecranon process of the ulna fits. And on the front of the humerus you have the coronoid fossa is where the coronoid process of the ulna fits. So when you bend, when you flex and extend your elbow, the processes fit into their corresponding fossa. Alright, those are all the key parts of the humerus. There are certainly more, but those are the key ones that I want you to know. I hope this helps. Have a wonderful day. Be blessed.