What is synarthrodial joint characterized by?

A synarthrodial joint is characterized by its immobile nature, as it is designed for stability rather than movement. This type of joint allows for little to no movement, effectively connecting bones through fibrous tissue or cartilage. The key aspect of synarthrodial joints is their function in providing strength and support to the skeletal structure, commonly seen in the sutures of the skull, where the bones are tightly bound together.

In contrast, the other options describe joints that allow for different ranges of motion. For instance, a movable bony joint refers to a type of joint that allows for a degree of movement, while a freely movable synovial joint is designed for a wide range of motion in various directions. A joint with significant flexibility suggests a greater range of movement or adaptability than what synarthrodial joints provide. This distinction highlights the unique function and structure of synarthrodial joints in the human body.