They can perform gliding, rotating, or angular movements.
It's unrelated to the skin, eyes, or bowels, but some diseases of these structures can be diagnosed using the genetic marker HLA-B27. The innervation of these structures is described by Hilton's law. Rash, fever, and pain in these structures are the three main elements in diagnosing Still's disease. One disease affecting these structures can be treated using DMARDs or TNF-alpha inhibitors. Capsules that surround these structures have an outer fibrous stratum and inner membranes that contain bursae. Those bursae are filled with (*) synovial fluid whose main function is to provide lubrication to these structures and the cartilage surrounding them. These structures come in ellipsoidal, saddle, ball-and-socket, and hinge types. They can perform gliding, rotating, or angular movements. For 10 points, name these structures that connect bones.
It's unrelated to the skin, eyes, or bowels, but some diseases of these structures can be diagnosed using the genetic marker HLA-B27.
synovial joints [prompt on spine or vertebrae until "Hilton's law" is read]