Craniofacial sutures are bone growth fronts that respond and adapt to biomechanical environments. However, how the sutural tissues are configured for permitting growth and avoiding damage incurred by bone functional environments are unclear. We hypothesized that the microstructure of sutural tissue changed with ontogenies of bone morphology and function. Thirty suture specimens between the surangular and the dentary bones on external sides of the 14 mandibles of American alligator (Alligator mississippiensis), between 2 and 8
