2.CBQ - 2. Bones are a 1 necessary part of the body. They provide protection and support for the vital organs, like the heart, brain and lungs. Bones are actually living cells they grow and change over time. The whole bone structure of the body is called the skeleton. The place where two bones come together is called a joint. The knee joint is the biggest and strongest joint in the body. Ligaments link bones together at the joints. They are very strong and can stretch. Muscles are attached to bones by tendons. The muscles and tendons together allow the bones move. (a) Which of the following bones protect the heart? *​