Respiration and Circulation Multiple Choice Questions and Answers 9 PDF Download
Respiration and circulation multiple choice questions (MCQs), respiration and circulation test prep 9 to learn online elementary school courses, distance learning for exam prep. Practice respiration and breathing multiple choice questions (MCQs), respiration and circulation quiz questions and answers for science class for 8th grade science practice test online.
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MCQ on Respiration and Circulation Worksheets 9 Quiz PDF Download
MCQ: Human beings have specialized structure to carry out exchange of gases called
- respiratory system
- digestion system
- nervous system
- circulatory system
MCQ: Blood which is oxygenated in lungs is carried to heart by
- pulmonary veins
- carotid veins
- jugular vein