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Gaseous Exchange Through Lungs
|Gaseous Exchange Through Lungs by chibuike nelson: 9:54 pm On June 20, 2018|
Under normal circumstances, the toad gets sufficient oxygen for its skin and buccal cavity. To draw air into the lungs, air is first sucked into the buccal cavity as just described. Then, the nostril are closed, the glottis is opened, and the floor of the buccal cavity is raised. This increases the air pressure in the buccal cavity, forcing air into the lungs through open glottis. The lungs become Inflated as air fills the aveoli. Gaseous exchange occurs between the inhaled air in the alveoli and the blood in the capillaries lining the alveoli.
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