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PIMSO 2025 - Science - Primary 5 - National Round Question 6

PIMSO Science · PIMSO 2025 - Science - Primary 5 - National Round

Question 6

Read the following descriptions of the human respiration process below.
P air enters the body through the nose
Q carbon dioxide leaves the body through nose
R blood transport carbon dioxide to the lungs
S air pass through the windpipe and lungs take in oxygen
T oxygen passes into the blood and is transported to other parts of the body
Arrange the description in the correct order to describe what happens when a person breathes in and out.

Question illustration
  1. P-Q-R-S-T
  2. P-S-T-R-Q
  3. P-R-T-Q-S
  4. P-T-Q-S-R