Advancement in knowledge of the comparative Anatomy of joints has generally lagged behind than that of other structural systems. The knee joint has been chosen for special study as representing the largest and functionally important articular unit, provided with an extensive synovial cavity and a variety of both intra and extra articular structure. Haines (1942). The garden lizard is only mammals which does not possess of popliteus muscle. The femoro fibular and femoro tibial articulation has both internal and external ligamentus connection and menisci. There is a femoro- fibular disc, a fibro cartilaginous pad occupying the anterior part of the femorofibular joint. Lateral condyle of femur possess a concave facet for articulation with fibula, the fibula is separated by a shallow gap from the tibia but bears a facet for articulation with the femur. The knee joint is of peculiar interest as manifesting a change of mechanism of locomotion in passing from tetrapod (Garden Lizard) to mammals and affording a means of studying, the corresponding modifications of anatomical structures. 10 Garden lizards (versicolor) were selected and 10 human knee joint were selected from the dissection hall in Anatomy departmen
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