Figure 1. Cancellous bone occurrence and macrostructure, as illustrated here with the femur of a cow (Bos tauros), sectioned in the coronal plane.

(A) Cancellous bone occurs in the proximal and distal ends of the bone (as indicated by the braces), underlying the thin cortical bone capping the epiphyses and apophyses, as well as the metaphyses. (B) A close-up view of the cancellous bone reveals the high porosity of the tissue, giving it a spongy appearance.