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Mechanisms of Breathing (3)
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Structure that helps breathing in frogs
Muscular buccopharyngeal wall
Structure that helps breathing in human
Diaphragm, ribcage and intercostal muscles
Breathing mechanism of insects
Assisted by the contraction and relaxation of abdominal muscles
Breathing mechanism of fish
Assisted by movements of the floor of the buccal cavity and operculum
Breathing mechanism of frog
Assisted by the rapid movement of the buccopharyngeal cavity floor and elasticity of the lungs
Breathing mechanism of human
Assisted by the contraction and relaxation of the intercostal muscles and the diaphragm muscles as well as the movement of the rib cage upward and outward, and downward and inward
Breathing
Refers to the repetitive inhalation and exhalation process
The condition of external intercostal muscles during inhalation
The external intercostal muscles contract
The condition of internal intercostal muscles during inhalation
The internal intercostal muscles relax
The condition of diaphragm muscles during inhalation
The diaphragm muscles contract and the diaphragm moves downwards to become flat and horizontal
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