Integration of digestive, respiratory and circulatory systems
P5 Science · Human System · 108 questions · difficulty D1–D5 · Singapore MOE-aligned
Sample questions
SAMPLE 1
Oxygen breathed in enters the blood in the lungs. Which system carries it to the muscles?
A Muscular system
B Respiratory system
C Digestive system
D Circulatory system
SAMPLE 2
A student exercises — her breathing and heart rate increase. Which two systems are working harder?
A Digestive and respiratory systems
B Nervous and muscular systems
C Respiratory and circulatory systems
D Circulatory and digestive systems
SAMPLE 3
During exercise, a student breathes faster and her heart beats faster. Predict what would happen if only her breathing rate increased but her heart rate stayed the same.
A Her blood would stop flowing
B Her muscles would get more food than usual
C She would breathe out more carbon dioxide than normal
D Oxygen would not be delivered quickly enough to muscles
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