And it's the conron, it's the extracellular matrix that is composed of these three different types of substances in different proportions, in different proportions. Basically those proportions depend on the type of cartilage that we are examining. So if we examine the high limb cartilage, that is found, for example, on the top portion of long bones, and that is shown here. 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.