Class 8 Science MCQs - Chapter 9
Respiration and Circulation Multiple Choice Questions (MCQs) PDF Download - 9
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Respiration and Circulation MCQs with Answers PDF Download: Quiz 9
Human beings have specialized structure to carry out exchange of gases called
- respiratory system
- digestion system
- nervous system
- circulatory system
The blood which is oxygenated in lungs is carried to heart by
- pulmonary veins
- carotid veins
- aorta
- jugular vein
Class 8 Science Mock Tests
Respiration and Circulation Study App: Free Download iOS & Android
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