Standard Science Primary 5 Systems

Study the table comparing the blood in Blood Vessel X and Blood Vessel Y. Which of the following correctly identifies the vessels?

A X: Vein carrying blood from lungs; Y: Artery carrying blood to lungs
B X: Artery carrying blood to body; Y: Vein carrying blood from body
C X: Vein carrying blood from body; Y: Artery carrying blood to body
D X: Artery carrying blood to lungs; Y: Vein carrying blood from lungs
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Worked Solution

Step 1: Blood Vessel X has high oxygen and low carbon dioxide. This describes blood leaving the lungs/heart to go to the rest of the body. Step 2: Blood Vessel Y has low oxygen and high carbon dioxide. This describes blood returning from the body parts to the heart. Step 3: Therefore, X carries blood to the body, and Y carries blood from the body.

Correct answer: X: Artery carrying blood to body; Y: Vein carrying blood from body

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