1. Which of the following would not be considered a fibrous joint? a. The joint between the parietal bone and the occipital bone b. The joint between a tooth and the mandible c. The pubic symphysis d. The interosseous membrane of the leg

The pubic symphysis is actually a cartilaginous joint, not a fibrous one. While fibrous joints, like the sutures of the skull and the gomphosis between teeth and their sockets, lack a joint cavity and are typically immovable, the pubic symphysis allows for slight movement to accommodate childbirth. To make it even more interesting, the interosseous membrane of the leg, though also not a fibrous joint in the traditional sense, provides stability between the tibia and fibula, allowing for some flexibility during movement, which is essential for activities like running and walking!