Figure 1
From: The life cycle of chondrocytes in the developing skeleton
A section through the growth plate of a fetal mouse metatarsal, 17 days post fertilization. Blue staining indicates endogenous alkaline phosphatase activity in the hypertrophic chondrocytes, diaphyseal perichondrium and bone collar, and primary spongiosa. Safranin O staining of chondromucin in the cartilage matrix is red. The regions populated by each stage of the chondrocyte lineage are shown.