Standard Science Primary 4 Systems

Sara wants to bend her arm. Which two systems must work together to allow this movement?

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

Step 1: Movement requires bones for structure and muscles for pulling. Step 2: Muscles are attached to bones. Step 3: Therefore, the skeletal and muscular systems work together.

Correct answer: Skeletal and Muscular systems

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