Respiration and Circulation Multiple Choice Questions and Answers 9 PDF Download

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MCQs on Respiration and Circulation Worksheets 9 Quiz PDF Download

MCQ: Human beings have specialized structure to carry out exchange of gases called

  1. respiratory system
  2. digestion system
  3. nervous system
  4. circulatory system

A

MCQ: Blood which is oxygenated in lungs is carried to heart by

  1. pulmonary veins
  2. carotid veins
  3. aorta
  4. jugular vein

A