Class VII

Flu is caused due to presence of
  1. Bacteria
  2. Viruses
  3. Insects
  4. Dust
Contraction of bronchi causes
  1. Flu
  2. Cough
  3. Fever
  4. Asthma
MCQ. Most of water is removed through
  1. Urination
  2. Breathing
  3. Sleeping
  4. Sweating
Due to contraction of bronchi
  1. it is difficult to inhale air
  2. it is difficult to exhale air
  3. it is difficult to breathe
  4. it is difficult to cough
Air is made warm by
  1. hairs in nostrils
  2. blood capillaries in nostrils
  3. water in the nose
  4. mucus lining in nostrils
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