<span>The upper chamber is called an atrium (or auricle), and the lower chamber is called a ventricle. The two atria act as receiving chambers for blood entering the heart; the more muscular ventricles pump the blood out of the heart.</span>
What? who doesn't like food
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As I am walking through the dark forest I see a delightful green tree frog as I hop over a gently flowing stream. I sit down next to a huge oak tree, and read my adventurous book
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