Fig. 1From: Expression and function of cartilage-derived pluripotent cells in joint development and repairZonal structure of cartilage. a Hyaline cartilage is compartmentalized into the surface zone, middle zone, deep zone, and calcified zone. b Fibrocartilage in TMJ condyle is divided into four distinct zones: the fibrous SZ, a polymorphic zone, a zone of chondrocytes, and a zone of hypertrophic chondrocytesBack to article page