So this is also known as articular cartilage because it is also connected to our joints. And if we zoom in on this type of highland cartilage, we basically will find the matrix, the chondrin and our chondrocytes ourselvess. And this chondrin will be composed predominantly of our collagen fibers, because hyland cartilage consists predominantly of collagen. So now, let's move on to the three different types of joints. We have the fixed joints, the synovial joints, as well as our carthalaginous joints. So the fixed joints are also known as our immovable or fibrous joints.