Question

Inter-articular disc occurs in
A. Wall of heart
B. Wall of liver
C. Pubic symphysis
D. In between two vertebrae

Answer 1

Hint:-In addition , the presence of an articular disc enables a more balanced distribution of pressures between the articulating surfaces of the bones, improves joint mobility and helps guide the flow of synovial fluid to the areas of the articular cartilage that are most frictionally affected.

Complete Answer:-Intra-articular fibrocartilages are complete or incomplete fibrocartilage plates attached to the joint capsule that extend between a pair of co articular surfaces around the joint cavity. They are called discs when complete, they are called menisci when incomplete. Disks are found in the lower jaw, the sternoclavicular joint and the ulnocarpal joint of the temporomandibular joint.
Each knee joint comprises a pair of meniscus, one between each femoral condyle and its female tibial counterpart. There is a thin meniscus present at the top of the shoulder in the upper portion of the acromioclavicular joint. These fibrocartilages are really components of the diarthrosis fibrous layer in which they occur and, depending on whether they are discs or menisci, they affect a total or partial division of the articular bursa into two components.
In humans, 26 serially arranged units called vertebrae form the vertebral column and are dorsally placed. A thin, oval plate of fibrous cartilage constitutes the intra articular disc. A fibrocartilaginous joint (a symphysis) forms each interarticular disc, allowing the vertebrae to move slightly, and functions as a ligament to keep the vertebrae together. Therefore, between the two vertebrae, there is an intra-articular disc.

Hence, the answer is (d) In between two vertebrae

Note:- A disc or meniscus is mostly fibrocartilage, with slight chondrification and a predominant fibrous portion, especially in the part closest to the investing ligament. They may also ingest foreign material, in addition to producing and preserving the membrane matrix, and thus have a phagocytic role. They seem to be the only cells able to secrete hyaluronic acid, the synovial fluid 's characteristic component.