By Ann Jadin
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Excellent illustration - really helpful material
In this animated and interactive object, learners identify the valves and chambers of the heart.
In this animated and interactive object, learners examine how blood flows through the heart and lungs. A brief quiz completes the activity.
In this colorful and interactive object, learners examine the structure and function of muscle and connective tissues. A quiz completes the activity.
Test your knowledge of respiratory pathogens.
What you need to know about trees
Can you guess the respiratory term described by the accompanying phrase?