Origin of Reptiles: The origin of reptiles is well suited to maintain life on land. Many features show a considerable advance in this respect over the Amphibia. These are the: (i) Dryness of the skin, (ii) Reproduction, and (iii) Devices for economising the use of water. Reptiles have a dramatic evolution. They had an obscure beginning in the Palaeozoic, they [...]
The respiratory system of Uromastix consists of two main portions, viz., respiratory tract and respiratory organs. Respiratory Tract: The respiratory tract starts from the external nares. These are a pair of small oval apertures on the snout slightly above the mouth. On its inner side each naris possesses a prominent swelling of mucous membrane which serves as a valve to [...]
In Uromastix, the excretory and reproductive systems are closely associated as in other vertebrates. Therefore, the two systems are described together under the heading urinogenital system. The sexes are separate but the sexual dimorphism is not well developed. Excretory System: The excretory system is similar in both the sexes and consists of a pair of kidneys, a pair of ureters [...]