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The diaphragm muscle contracts and relaxes to facilitate breathing by altering thoracic cavity volume.
Ref: NCERT Class 11 Biology Chapter 17: Locomotion and Movement Skeletal System - Axial Skeleton - Skull Vertebral Column
The diaphragm moves actively during the breathing cycle, contracting during inspiration and relaxing during expiration.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Mechanism of Breathing and Respiratory Volumes
During expiration, the diaphragm relaxes and moves upward, decreasing thoracic volume and pushing air out.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Mechanism of Breathing and Respiratory Volumes
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
During inspiration, the diaphragm contracts and moves downward, increasing thoracic volume and reducing pressure, allowing air to enter the lungs.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Respiratory Organs and Human Respiratory System
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