Standard Science Primary 5 Systems

Which two systems work closely together to ensure that oxygen reaches all parts of the human body?

A Digestive and Circulatory systems
B Digestive and Respiratory systems
C Skeletal and Muscular systems
D Respiratory and Circulatory systems
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Worked Solution

Step 1: The respiratory system takes in oxygen from the air into the lungs. Step 2: The circulatory system absorbs this oxygen into the blood and pumps it via the heart to all parts of the body.

Correct answer: Respiratory and Circulatory systems

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