334 



THE ARTICULATIONS, OR JOINTS 



be inserted into the outer and fore part of the inner condyle of the femur. It is 

 in relation, in front, with the anterior crucial ligament; behind, with the capsular 

 ligament. 



The semilunar fibrocartilages (menisci} (Figs. 268 and 269) are two crescentic 

 lamellae which serve to deepen the surface of the head of the tibia, for articula- 

 tion with the condyles of the femur. The circumference of each cartilage is thick, 

 convex, and attached to the inside of the capsule of the knee; the inner border 



SUPRAPATCLLAR 

 BURSA 



TENDON OF QUADRICEPS 

 EXTENSOR FEMORIS 

 MUSCLE 



ARTICULAR 

 CAPSULE 



EXTERNAL 



SEMILUNAR 



FIBROCARTILAGE 



ARTICULAR 

 CAVITY 



LIGAMENTA 

 ALARIA 



LIGAMENTUM 

 PATELLAE 



DEEP INFRA- 

 PATELLAR BURSA 



EPIPHYSEAL 

 JUNCTION 



TUBEROSITY 



OF TIBIA 



FIG. 270. Right knee-joint Sagittal section through the external condyle of the femur. Mesal half of 

 section, from the lateral side. The knee is slightly flexed; the joint surfaces have been pulled a little apart. 

 (Spalteholz.) 



is thin, concave, and free. Their upper surfaces are concave, and in relation 

 with the condyles of the femur; their lower surfaces are flat, and rest upon the 

 head of the tibia. Each cartilage covers nearly the outer two-thirds of the 

 corresponding articular surface of the tibia, leaving the inner third uncovered; 

 both surfaces are smooth and invested by synovial membrane. 



The internal semilunar fibrocartilage "(meniscus medialis) is nearly semicir- 

 cular in form, a little elongated from before backward, and broader behind than 



