Assertion: circulatory system's heart | /r/HasProperty | organ
Facets:
Source sentences:
text: There has been a debate over the years on whether the heart is an organ or a muscle.
text: The parts of the cardiovascular system include the heart, which is the organ that pumps the blood, and a network of blood vessels:
text: The heart is an organ that has the role of a pump.
text: The kidneys, the heart and even skin are all organs.
text: It's made up of the heart, the organ that pumps blood, and the veins and arteries that move blood to and away from body tissues.