Assertion: human body's system | /r/HasProperty | the heart
Facets:
Source sentences:
text: (4) The circulatory system, composed of the heart, blood, and blood vessels, circulates a transport fluid throughout the body, providing the cells with a steady supply of oxygen and nutrients and carrying away waste products such as carbon dioxide and toxic nitrogen compounds.
text: The cardiovascular system is comprised of the heart, blood, and blood vessels.