• Cyst- Membranous sac containing fluid.
• Tendons- Flexible fibrous tissue cord which attaches muscles to bones.
• Tendon sheath- A membranous layer around tendon which enables it to stretch without adhesions to surrounding structures.
• Joint- Area where two or more bones are fitted together.
• Joint capsule- Sac surrounding the joint.
• Aneurysm- Localized swelling of an artery wall.
• Arthritis- A disease characterized by pain & stiffness of joints.