In this article we will discuss about the dentition in mammals with the help of a suitable diagram. Teeth and Dentition: The hard and usually pointed structures connected to the jaw bones in the buccal cavity of vertebrates are known as teeth. The structure, kind, number and arrangement of teeth are collectively called dentition. Although teeth are found among fishes, [...]
Structure of teeth is similar in all the vertebrates. A typical mammalian tooth is differentiated into 3 parts- crown, neck and root. Crown is the visible part of the tooth projecting out from the gum and out of the jaw bone. Root is the basal part, embedded in a socket or alveolus of the jaw bone. The junction of crown [...]
During Mesozoic era, the age of reptiles (dinosaurs), mammals were small, generalised and rare. By the end of Mesozoic or beginning of Coenozoic, the dinosaurs vanished and mammals suddenly expanded into varied evolutionary patterns. Early in Cretaceous period, placental mammals became distinct from marsupials. During Eocene and Oligocene, most of the orders of mammals originated moving into habitats and ecological [...]