And let's begin with this purple section found on this side as well as on this side, which is not shown. So this is known as our articular cartilage. So articular simply means that's the connecting point between the bone and our joint. And we'll discuss what the joint is and what types of joints we have in our body in a future lecture. So basically, this consists of a type of cartilage known as the highland cartilage, where the Hylin simply means it's transparent. And this highland cartilage connects our bone to our joint.