Class 8 Science MCQs – Certification Test 303

Respiration and Breathing MCQ (Question 303) – App & e-Book Download

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MCQ 303: A sheet of muscles which contracts or flatten when we breathe is called:

diaphragm
ribs
lungs
stomach

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Free Respiration And Breathing Textbook App – Download from Play & App Store

The App: Respiration and Breathing MCQ App to learn Respiration and Breathing Notes, 8th Grade Science MCQ App, and Earth Science MCQ App. The "Respiration and Breathing" App Download – Free 8th Grade Science MCQ App (iOS & Android) to study e-learning courses. Download App Store & Play Store Learning Apps with all functionalities for online school and college.