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In this activity, learners take their own pulse and explore how heart rate is affected by various activities.

In this simulation activity, learners act as parts of the circulatory system and discover how it serves as a transport system for food/nutrients, oxygen, carbon dioxide and waste.

In this activity on page 9 of the PDF, learners test how flavoring extracts move through the walls of a balloon.

Learners will construct a model of a heart valve using a film canister, a piece of masking tape, and a piece of paper.