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12th Maharashtra Board
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The muscular structure that separates the thoracic and abdominal cavity is

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Important Questions on Respiration and Circulation

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12th Maharashtra Board
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Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
What is the minimum number of the plasma membrane that oxygen has to diffuse across to pass from air in the alveolus to haemoglobin inside an RBC? 
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12th Maharashtra Board
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Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
_____ is a sound producing organ.
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12th Maharashtra Board
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Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
The maximum volume of gas that is inhaled during breathing in addition to T.V is
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12th Maharashtra Board
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Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1

_____ muscles contract when the external intercostal muscles contract

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12th Maharashtra Board
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Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
Movement of cytoplasm in unicellular organisms is called  _____.
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12th Maharashtra Board
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Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
Which of the following animals do not have closed circulation?
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12th Maharashtra Board
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Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
Diapedesis is performed by
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12th Maharashtra Board
IMPORTANT
Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
Pacemaker of heart is