Which term denotes an immovable union of two components joined together?

Which term denotes an immovable union of two components joined together?

• A. Intercondylar Line
• B. Intracapsular Ligament
• C. Extracapsular Ligament
• D. Synarthrosis

Answer: (D)

In anatomy, joints are classified by how much they move. The term that describes an immovable joint, where two bones are joined together with no detectable movement, is synarthrosis. This category includes structures like skull sutures and gomphosis (tooth in its socket), whose primary role is to form a rigid, stable union rather than allow motion. The other options aren’t about the degree of motion. An intercondylar line is just a bony landmark on the femur, not a joint type. Intracapsular and extracapsular ligaments are types of ligaments based on their location relative to the joint capsule; they provide stability but don’t define an immovable joint themselves.

In anatomy, joints are classified by how much they move. The term that describes an immovable joint, where two bones are joined together with no detectable movement, is synarthrosis. This category includes structures like skull sutures and gomphosis (tooth in its socket), whose primary role is to form a rigid, stable union rather than allow motion.

The other options aren’t about the degree of motion. An intercondylar line is just a bony landmark on the femur, not a joint type. Intracapsular and extracapsular ligaments are types of ligaments based on their location relative to the joint capsule; they provide stability but don’t define an immovable joint themselves.