Bones are connected to one another and held together by ligaments. About.com Sports Medicine says that ligaments are strong bands of tissue that hold bones in complete alignment, preventing the skeleton from being turned or twisted into unnatural, potentially damaging angles.
According to Dictionary.com, ligaments are typically white and fibrous. It is possible to stretch or tear a ligament beyond its natural range, which typically occurs during an injury. Ligament injuries, or sprains, typically occur when a ligament is stretched out of its normal position, and ligaments can also tear. Ligament injuries take time to heal, and depending upon strain severity, remedies include rest and elevation or even surgery.