FIGURE 1 in Histology of spinosaurid dinosaur teeth from the Albian-Cenomanian of Morocco: Implications for tooth replacement and ecology

FIGURE 1. (A) Schematic drawing of a tooth cross section showing the concentric incremental lines of von Ebner and the radial tubuli. (B) Schematic drawing of a tooth longitudinal section; it demonstrates why cross sections do not always show all growth lines.