Morphological and Cellular Aspects of Tail and Limb Regenerat... by Lorenzo Alibardi

The regenerates were found to contain mostly irregular, dense connective tissue around a central rod of cartilage. that reviewed the earlier literature on tail regeneration in crocodilians has shown that long and apparently regenerated tails were present in several alligators. However, limb regeneration appears to be absent from all reptiles, while tail regeneration has, for example, been reported from the Yacare caiman by Dathe and illustrated in a Caiman crocodilus by Kälin and is, of course, a well-studied phenomenon in Lacertilia. Rashid & Chapman have discussed why it is not always easy to precisely define the tail and denote the boundary between it and the trunk and have pointed out that “outgrowth of the tail from the secondary body shares numerous developmental features with limbs”. Englisch.Repairs to part of the mandible and cutaneous scutes in crocodilians have been mentioned, Brazaitis ( Figure 1B), but information on regenerative processes involving tails is not extensive, although it has been documented as early as 1937. The lizard model is usually neglected in the literature despite the fact that the lizard is an amniote with a basic histological structure similar to that of mammals, and it is therefore a better model than the salamander (an a- mniote) model to investigate regeneration issues. This condition offers a unique opportunity to study at the same time mechanisms that in different regions of the same animal control the success or failure of regeneration. Lizards represent the only amniotes that at the same time show successful organ regeneration, in the tail, and organ failure, in the limb (Marcucci 1930a, b Simpson 1961, 1970, 1983). The term 'regeneration' is intended here as 'the ability of an adult organism to recover damaged or completely lost body parts or organs.' The process of recovery is further termed 'restitutive regeneration' when the lost part is reformed and capable of performing the complete or partial physiological activity performed by the original, lost body part. Druck auf Anfrage Neuware -The present review covers a very neglected field in regeneration studies, namely, tissue and organ regeneration in reptiles, especially represented by the lizard model of regeneration.

Morphological and Cellular Aspects of Tail and Limb Regenerat... by Lorenzo Alibardi