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प्रश्न
On the inside, the heart is a ______, hollow organ. It is divided into the left and right side by a muscular wall called the ______. The right and left sides of the ______ are further divided into two top chambers called the ______, which receive blood from the veins, and two bottom chambers called ______, which pump blood into the ______.
रिक्त स्थान भरें
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उत्तर
On the inside, the heart is a muscular, hollow organ. It is divided into the left and right side by a muscular wall called the septum. The right and left sides of the heart are further divided into two top chambers called the atria, which receive blood from the veins, and two bottom chambers called ventricles, which pump blood into the arteries.
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