Assertion: circulatory system's heart | /r/HasProperty | aorta
Facets:
value: in some animals
type: OTHER
value: simply
type: DEGREE
Source sentences:
text: In some animals, the heart is simply an aorta or other blood vessel, and the hemolymph is pulsed throughout the body by muscle contractions.
text: The main artery from the heart (aorta) becomes thicker, stiffer, and less flexible.