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Your heart is a very strong muscular body. It is about the size of your fist. |
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Your heart is divided into two sides by a wall. Each side is divided by a floor into an upper and lower room. |
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Your heart is a very strong muscular body. It is about the size of your fist. |
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Your heart is divided into two sides by a wall. Each side is divided by a floor into an upper and lower room. |
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| The right side of your heart always fills with impure blood from the body. |  |
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The left side of your heart always fills with pure blood from the lungs. |
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