| Term 
 
        | What muscles Expand the lungs |  | Definition 
 
        | Diaphragm and External Intercostals |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | O- Xiphoid Process of Sternum, Ribs, and Costal Cartilages I- Central Tendon of Diaphragm
 |  | 
        |  | 
        
        | Term 
 
        | The External Intercostals O-
 I-
 |  | Definition 
 
        | O- Inferior Margins of Ribs I- Superior Margins of Ribs
 |  | 
        |  | 
        
        | Term 
 
        | The Internal Intercostals O-
 I-
 |  | Definition 
 
        | O- Superior Margins of Ribs I- Inferior Margins of Ribs
 |  | 
        |  | 
        
        | Term 
 
        | The external intercostals- ___ the ribs The Internal intercostals _____ the ribs
 |  | Definition 
 
        | Elevate the ribs and expand the lungs Depress the ribs and compress the lungs
 |  | 
        |  |