Q. In a tobacco leaf, there are 12000 stomata per square

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Q. Breakdown of alveoli is called

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Q. Organ which lie ventral to esophagus extending in chest cavity is a tubular structure called

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Q. Capacity of human blood to carry oxygen is raised up to 75 times by

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Q. Lungs are

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Q. When air rushes into vacuum inside of lungs, it constitutes process of

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Q. Maximum oxygen can be absorbed at a level of

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Q. Asthmatic patients are prone to

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Q. Oxygen is less soluble as compare to carbon dioxide is

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Q. Exchange of gasses through diffusion takes place when there is a difference in

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Q. Epithelium is only two cell thick which facilitates process of

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Q. Mechanical process which consists of two phases inspiration and expiration is called

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Q. Complex cartilaginous structure present at upper end of trachea is called

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Q. Oxygen combines with hemoglobin in blood and form

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Q. Opening of larynx is called

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Q. When exchange of gases take place in lungs, it is called

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Q. Respiration in fish is done by help of paired

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Q. In rigorous exercises, fatigue results due to

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Q. Respiration is a/an

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Q. Tissue respiration is also referred as

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