Assertion: circulatory system's heart | /r/HasProperty | invaluable
Facets:
Source sentences:
text: Together we combined efforts in designing and creating a working model of a pumping heart which was invaluable to the overall understanding of the function of the heart and as a result gives me the ability to make a working heart to use as a demonstration for the students in the classroom.
text: The heart is a vital organ which pumps blood around the body delivering oxygen to working muscles and transporting waste products, eg carbon dioxide back to the heart and lungs for removal from the body.