Fig 10.

Histological ground sections of A). T.rex cortical bone and B) B. Canadensis cortical bone, from which the vessels in this study derive. No evidence of focal destruction Wedl tunneling, or other signs of microbial invasion are visualized. However, histological detail, including multiple generations of secondary osteons (arrowheads) and osteocyte lacunae with cannalicular extensions (arrows) are visible in both samples, attesting to histological integrity. The lack of cement lines (indicating remodeling) in B. canadensis bone support a younger ontogenetic age for this dinosaur.