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12th Maharashtra Board
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Diapedesis can be seen in cell.

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Important Questions on Respiration and Circulation

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12th Maharashtra Board
IMPORTANT
Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
Opening of inferior vena cava is guarded by
EASY
12th Maharashtra Board
IMPORTANT
Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
Wave in ECG represent atrial depolarisation. 
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12th Maharashtra Board
IMPORTANT
Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.1
 The fluid seen in the intercellular spaces in human is
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12th Maharashtra Board
IMPORTANT
Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.2

Match the Respiratory surface to the organism in which it is found.

Respiratory surface Organism
Plasma membrane Insects
Lungs Salamander
External gills Birds
Internal gills Amoeba
Trachea Fish
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12th Maharashtra Board
IMPORTANT
Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.3
Why does trachea have C- shaped rings of cartilage?
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12th Maharashtra Board
IMPORTANT
Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.3

Why is respiration in insects called direct respiration?

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12th Maharashtra Board
IMPORTANT
Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.3

Why is gas exchange very rapid at alveolar level?

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12th Maharashtra Board
IMPORTANT
Biology Standard 12>Chapter 8 - Respiration and Circulation>Exercise>Q Q.3
Name the organ which prevents the entry of food into the trachea while eating.