 That is, the number, type, and morpho-physiology (that is, the relationship between the shape and form of the tooth in question and its inferred function) of the teeth of an animal.Animals whose teeth are all of the same type, such as most non-mammalian vertebrates, are said to have "homodont" dentition, whereas those whose teeth differ morphologically are said to have "heterodont" dentition.The dentition of animals with two successions of teeth (deciduous, permanent) is referred to as "diphyodont", while the dentition of animals with only one set of teeth throughout life is "monophyodont".