schematic depiction of articular cartilage and chondrocytes of the joint surface. structural and molecular changes

chondrocytes lacunae chondroblast cells produce collagen extracellular matrix schematic articular cartilage joint surface molecular process structural structure healthy fibroblast cell marrow stromal chondrocyte hypertrophic chondros mitochondria nucleus microscope fibers scientific education chondroblasts flexible stem scheme illustration biology human health anatomy medical diagram elastic science connective