Class VIII

Small air sacs which are present at end are called
  1. trachea
  2. alveoli
  3. nostril
  4. bronchi
Exhaled air is air which we
  1. breath in
  2. breath out
  3. transport in body
  4. use under water
Life span of red blood cells is
  1. 2 months
  2. 45 days
  3. 4 months
  4. 12 days
Upper small chambers are called as
  1. atria
  2. ventricle
  3. systole
  4. diastole
Division of windpipe is done in two
  1. bronchioles
  2. alveoli
  3. nostril
  4. bronchi
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