the time spent by cells at each stage of development is estimated to be 1.4 days as chondroblasts , 0.5 days as flattened chondrocytes , 2.3 days as the chondrocytes of the upper hypertrophic cell layer , and 1.1 days as those of the lower hypertrophic cell layer .
C0225369
chondrocytes
C0007634
cell