It is ligaments, tendons, fascia, periosteum, labrum, meniscus, the tempro-mandibular joint (TMJ), and cartilage.

Ligaments connect two bones at at joint, allowing some motion, with that motion bounded and controlled by the ligaments.  Tendons connect muscle to bone, allowing the muscle to move the bone.  Fascia is the tough envelope surrounding muscles, and also forms tough sheets of tissue that provide fixation and support for the ‘soft tissues’ and which also connect them at points to bone.  Periosteum is the envelope that surrounds each bone.  All connective tissue structures are made almost entirely of ‘collagen’ molecules in a regular array (as opposed to the random array in ‘scar tissue’).