Periosteum
The periosteum multiplies to grow and repair bones when they break. If the bone is not set for proper repair by the periosteum, then it will heal as is.
cartilage protects the bones where they meet.
surrounds and protects bones
It is the bones at the chest that protects your chest. They are covered in muscle and tissue which does help pad and insulate it from the environment but it is the bones that do most of the protecting.
Cartilage is what protects the bones where they meet.
The immune system.
the bones provide the body shape and protects the internal organs
Your Rib Cage protects your lungs.
you peep
Bones and muscles protect organs.
Lungs have no bones. However, the rib cage which protects our vital organs, contains 16 bones.
Bronchial Tubes