Physiology of dinosaurs way as sauropods. The pachycephalosaurs had small heads and weak jaws and teeth, but their lack of large digestive systems suggests a different diet, possibly fruits, seeds, or young shoots, which would have been more nutritious to them than leaves. On the other hand, ornithopods such as "Hypsilophodon", "Iguanodon" and various hadrosaurs had horny beaks for snipping off vegetation and jaws and teeth that were well-adapted for chewing. The horned ceratopsians had similar mechanisms. It has often been suggested that at least some dinosaurs used swallowed stones, known as gastroliths, to aid digestion by grinding their food in muscular gizzards,
Logan (given name) Logan (given name) The given name Logan is derived from the Scottish surname "Logan", which is in turn derived from a place name. The likely origin of this surname is a place located near Auchinleck, in Ayrshire. The place name is derived from the Scottish Gaelic "lagan", which is a diminutive of "lag", which in turn means "hollow". The given name is borne by males and females. The given name was the 17th most popular name for baby boys born in the United States in 2007 and was the 455th most popular name for baby girls born there in 2007.