13 minutes | Jul 5, 2021

Is your Heart made of Blood?

Where does blood come from? What do your veins and arteries do? How do nutrients and oxygen reach every part of your body? For free home activities sign-up at www.WhoSmarted.comSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.
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