What is a suture in anatomical terms?

In anatomical terms, a suture is defined as an immovable joint found primarily in the skull. Sutures are fibrous joints that connect the bones of the skull, allowing for minimal or no movement between them. This immobility is vital for providing protection to the brain and maintaining the structure of the skull. As the skull develops, these sutures allow for the growth of the brain and the skull itself; however, they become firmly fused together in adulthood, solidifying their immovable nature.

The other options describe different types of joints or connections. For instance, a movable joint allows for flexibility and movement, which is not the case for sutures. A type of muscle connection pertains more to tendons or ligaments, not sutures. Lastly, a joint that allows for limited movement suggests a classification of joints that have some flexibility, which does not apply to the rigid structure of a suture. Therefore, recognizing sutures as immovable joints is crucial in understanding cranial anatomy and its implications for protection and support.