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Class 11BiologyBreathing and Exchange of GasesHuman Respiratory System
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What are the characteristics of alveoli?

  • A
    Very thin,irregular-walled,and highly vascularized
  • B
    Thick and smooth membrane
  • C
    Network of blood capillaries and thick-walled
  • D
    Thick,regular-walled,and lack of blood vessels
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Class 11 Questions

Class 11

Biology Questions

Chapter

Breathing and Exchange of Gases

Subtopic

Human Respiratory System

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