Gall stones : Gallstones formed in gall bladder may consist of cholesterol, salt, or bilirubin, which is discarded red blood cells. Gallstones range in size and can be as small as a grain of sand or as large as an apricot. Some gall stones contain large amounts of calcium.
Diphyodont is the condition of having two set of teeth during the life of an organism. For example : humans are diphyodont as they have two set of teeth namely temporary milk or deciduous teeth which are replaced by permanent or adult teeth.