The only thing you need to do is to GENTLY brush your tongue daily, as bacteria can collect in the fissures, causing bad breath. I'm enclosing a link to the couple of lines wikipedia has about it, mainly so you can see the picture there.
Quick Answer. As of 2009, there are 270 species of turtles, and more are being discovered. Turtles have been on the Earth for 230 million years and predate dinosaurs. Turtles have developed multiple habitats and live anywhere except the Arctic and Antarctic. Continue Reading.
There are about 8950 species of reptiles on Earth. Many more are currently being described and added to the list. The species are grouped into the following orders: Order Squamata Lizards and Snakes Order Chelonia/Testudines Tortoises and Turtles Order Crocodylia Crocodiles Order Rhyncocephalia Tuataras (of which there are only 2 species)