1-J-J 



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lation is, therefore, essentially constituted by two opposite osseous sin-faces, 

 which an- moulded to each other. These are either contiguous, independent, 

 and very movable continuous \\ith eucli other by means of u cartilaginous 

 substance which cuiuletiins them, if not to totul immobility, nt least to very 



Fig. 75. 



A 



: -__ 



a 



PLANS OF THE_DIFFERENT CLASSES OF ARTICULATIONS. 



A, Suture. 1, Periosteum; 2, Sutural ligament. U, Araphiarthrosis ; n, 



degree. 1, Periosteum ; 2, Articular cartilage ; 3, Interarticular ligament. b, 

 Second degree; 4, Single cavity in the interarticular ligament. <, Third degree; 

 5, Double cavity in the interarticular ligament. C, Dim -throsis ; /,, Sunp].' 

 diurtlirosis. 1, Periosteum; 2, Articular cartilage; .'!, Epithelial layer nt' the 

 synovial membrane dotted line; 4, Fibrous capsule; 5, ('ul-<lo-sac of' the syno- 

 vial membrane ; 6, Fibrous layer of the synovial membrane. c. Double diarthnVsis ; 

 7, Interarticular meniscus; 8, 9, Cavities of the two synovial membranes. 



limited movements : or united by a fibro-cartilage whoso elasticity permits a 

 certain degree of displacement between the bones which are in contact. 



In the first case, the articulations are classed as diarthroses, or movable 

 articulations. 



In the second, they are designated tynarthroses, suture*, or immovable 

 articulations. 



