In most vertebrates, ribs surround the chest they enable lungs to expand by expanding the chest, they also protect the lungs, heart, and other internal organs of the thorax.
Ribs surround the chest. This is in most vertebrates. They enable lungs to expand by expanding the chest also protect the lungs. They enable lungs to expand by expanding the chest also protect heart. They enable lungs to expand by expanding the chest also protect other internal organs of the thorax the chest. The chest is they.