Palmer Menti Practice Test

The main idea here is distinguishing joints by the tissue that binds them. In the pelvis, cartilaginous joints are those held together by cartilage rather than a synovial capsule. The pair that fits this is the pubic symphysis and the sacrococcygeal joint. The pubic symphysis is a secondary cartilaginous joint (a symphysis) with a fibrocartilaginous disc between the pubic bones, allowing only slight give to absorb forces. The sacrococcygeal joint is also a cartilaginous joint (a symphysis) between the sacrum and coccyx, permitting limited movement that can become more rigid with age. Other pelvic joints are not cartilaginous: the sacroiliac and lumbosacral joints are primarily synovial joints, though they have strong ligaments; the hip and knee are classic synovial joints; and the pubic arch and acetabulum are bony structures rather than joints themselves.