Class 8 Science MCQs - Chapter 9

Respiration and Circulation Trivia Questions and Answers PDF - 8

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Respiration and Circulation Questions & Answers PDF Download: MCQ Quiz 8

MCQ 36: Blood collects oxygen from inhaled air and gives off carbon dioxide in the

lungs
liver
kidneys
heart

MCQ 37: Respiration which takes place in the absence of oxygen is called

cellular respiration
aerobic respiration
anaerobic respiration
breathing

MCQ 38: There is higher concentration of oxygen in

inhaled air
exhaled air
circulated air
deoxygenated air

MCQ 39: The distance which is travelled by an average red blood cell is equal to

1500 km
1200 km
2100 km
5100 km

MCQ 40: Heart is made of specialized

cardiac muscles
connective tissues
both a and b
skeletal sphincters

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