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 [...]
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 [...]
The nervous system in Uromastix is generally on the amphibian plan. Many differences in the plan of nervous system between the two groups are not apparent anatomically but reptiles, however, indicate a higher degree of nervous efficiency. One of the major differences is the absence of lateral line system in reptiles. The absence of this system has been fully compensated [...]