jueves, 31 de julio de 2014

PROFESSOR BRYAN FRY DISCOVER KOMODO DRAGONS HAVE A WELL DEVELOPED VENOM GLAND

A LONG TIME AGO PEOPLE AND SCIENTISTS THINK THAT THE KOMODO DRAGONS HAD A GREAT COCKTAIL OF BACTERIA PRESENT IN THEIR  MOUTHS RESPONSIBLE FOR INFECTING WOUNDS THAT CAUSE HIS BITE...

BUT IT IS WRONG.......NOW THANKS TO PROFESSOR BRYAN FRY DISCOVER , WE KNOW THAT KOMODO DRAGONS HAVE A WELL DEVELOPED VENOM GLAND IN HIS MOUTH.



SOURCE: http://www.venomdoc.com/venomdoc/Komodo_Dragon.html

The predatory ecology of Varanus komodoensis (Komodo Dragon) has been of long-standing interest and considerable conjecture. My research investigated the roles and potential interplay between cranial mechanics, toxic bacteria, and venom. Results of analyses pointed to the presence of a sophisticated combined-arsenal killing apparatus. It was found that the lightweight skull was relatively poorly adapted to generate high bite forces, but better adapted to resist high pulling loads. The popular notion regarding toxic bacteria utilisation was rejected. Instead, it was demonstrated that the effects of deep wounds inflicted are potentiated through venom with toxic activities including anticoagulation and shock induction. The venom gland is shown to be multi-compartmental with each compartment having a large central lumen (red and pink below) and each of the six compartments having its own duct that thread between successive teeth. Dorsal to the venom gland are hundreds of mucus lobules (yellow below). Anatomical comparisons of V. komodoensis with Varanus (Megalania) prisca fossils suggested that the closely-related extinct giant was the largest venomous animal to have lived.


Below are three movies of magnetic resonance imaging, slicing in from different angles showing the venom gland compartments and how the ducts for each compartment terminate between the teeth.


VIDEO SOURCE : BBC

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