The Heart & Blood

Understand that the heart is a muscle that pumps blood around the body through tubes called blood vessels, and that we can feel our heartbeat by placing a hand on our chest or fingers on our wrist

Usually learned at ages 5–7

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On the map from: Marble Skill Taxonomy (v1), © Generative Spark, Inc. (withmarble.com), text CC BY-SA 4.0, database ODbL 1.0: https://github.com/withmarbleapp/os-taxonomy