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The rib cage encloses and protects vital organs like the heart and lungs.
Ref: NCERT Class 11 Biology Chapter 17: Locomotion and Movement Skeletal System - Axial Skeleton - Skull Vertebral Column
The diaphragm contracts and moves downward during inspiration, increasing thoracic cavity volume.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Mechanism of Breathing and Respiratory Volumes
The diaphragm is a dome-shaped muscle that separates the thoracic and abdominal cavities and plays a key role in respiration.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
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