Ossifying Cartilage Showing Calcification
Longitudinal section of ossifying cartilage from the humerus of a fetal sheep. Calcified trabeculae are seen extending between he columns of cartilage cells (c).
Baker, W. Morrant & Harris, Vincent Dormer Kirkes' Hand-book of Physiology, 13th ed. (Philadelphia: P. Blakiston's Son & Co., 1892) 67