1) Chest frame 2) Chest protector 3) Chest supporters 4) Chest wall 5) Expander during inhalation 6) Fortress around your heart 7) It expands when you inhale 8) It guards the heart 9) Organ case 10) Part of a chest 11) Protective part of a trunk 12) Protector of internal organs 13) Protector of the heart 
The rib bones
The rib bones