Q.
Volume of thoracic chamber increases in antero-posterior and dorso-ventral axis in rabbit by
1722
215
Breathing and Exchange of Gases
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Solution:
During inspiration, the contraction of diaphragm muscle causes it to become flat and lowered down, thereby increasing the volume of thoracic cavity in antero-posterior axis.
The contraction of external intercostal muscle, lift ribs and sternum up and outward causing an increases in volume of thoracic cavity in the dorso-ventral axis i.e., backward-forward direction.