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Biology
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Biology
Mechanisms of Breathing (1)
Biology
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Mechanisms of Breathing (1)
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Breathing mechanisms of insects; inhalation
During inhalation, the abdominal muscles relax; the air pressure inside the trachea decreases which allows air from outside to enter the trachea through the spiracle
Breathing mechanism of insects; exhalation
The abdominal muscles will contract when air is exhaled. This increases the air pressure in the trachea which forces the air to flow out of the spiracle
Breathing mechanism of frog; inhalation
Breathe through the nostrils, mouth, glottis closed; the floor oral cavity lowered; air enters the oral cavity. Glottis open; nostrils closed, the floor oral cavity raised; pushing air into the lungs
Breathing mechanism of frog; exhalation
The lungs contract, the air is expelled from the lungs. Air is also expelled through the nostrils while the rest is mixed with the air in the oral cavity
Breathing mechanism of fish; inhalation
The mouth opens, the floor buccal cavity is lowered, the operculum cavity enlarges, the operculum opening is closed; reduce the pressure in the buccal cavity; draws water into the mouth
Breathing mechanism of fish; exhalation
Mouth closed, floor buccal cavity rises; water enters lamellae; gas exchange occurs; the wall of the operculum contracts; reduce volume; increase the pressure of the oral cavity; push the water out
Condition of intercostal muscles of humans during inhalation
The external intercostal muscles contract and the internal intercostal muscles relax which causes the rib cage to move upwards and outwards
Condition of diaphragm of humans during inhalation
The diaphragm muscles contract makes the diaphragm move downwards and become flat
Condition of intercostal muscles of humans during exhalation
The external intercostal muscles relax and the internal intercostal muscles contract that cause the ribcage to move downwards and inwards
Condition of diaphragm of humans during exhalation
Diaphragm muscles contract causing the diaphragm to move upwards and become dome
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Mechanisms of Breathing (1)
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