Assertion: circulatory system's heart | /r/HasProperty | approximately 5.5 inches
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text: It is supported by ligaments attached to the sternum, or breastbone, and hangs slightly to the left of the center of the chest .A healthy heart weighs less than a pound (.45 kilograms), and is approximately 5.5 inches (14 centimeters) tall by 3.5 inches (9 cm) wide by 2.5 inches (6 cm) thick.