Heart
Bum bum, bum bum, that is the sound of your heart.
Your heart is located to the left of your chest. Its purpose is to get blood to your entire body. The heart is a muscle, which many people don't know.
Your heart is about the size of your fist, and is not in the normal heart shape.
The heart has four chambers filled with blood. Each side of the heart has 2 chambers. There's one in the top on each side and one on the bottom on each side. The top chambers are called atria. The atria are the chambers that fill up with blood that is coming back from the body and lungs. The bottom chambers are called the ventricles. Their job is to squirt out the blood to the body and lungs. Cutting the heart directly in half is a thick muscle called the septum. Its job is to keep the right side separate from the left side of the heart.
The atria and ventricles work together as a team to keep blood flowing in and out of the heart. As the atria fills with blood it then pours it into the ventricles.......
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