Cyanosis is:

  • A
    Lack of oxygen in body fluids
  • B
    Difficult or heavy breathing
  • C
    Excess of carbon dioxide in the body fluids
  • D
    Skin turning blue due to excessive amount of deoxygenated haemoglobin in the skin blood vessels

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Column-$I$ Column-$II$
$(I)$ Asthma $(A)$ Cigarette Smoking
$(II)$ Emphysema $(B)$ Wheezing
$(III)$ Occupational respiratory disorders $(C)$ Fibrosis

Ravi,who lived at sea level,had around $5$ million $RBC$ per cubic millimeter of his blood. Later when he lived at an altitude of $18,000 \ ft$,he showed around $8$ million $RBC$ per cubic millimeter of blood. This is an adaptation because

Tobacco smoke contains carbon monoxide which

Differentiate between: Emphysema and occupational respiratory disorders.

What is the cause of lung cancer in coal miners?

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