Assertion: double circulatory system | /r/ObjectUse | used in amphibian
Facets:
Source sentences:
text: In amphibians and most reptiles, a double circulatory system is used, but the heart is not always completely separated into two pumps.
text: In amphibians and most reptiles, a double circulatory system is used, but the heart is not always completely separated into two pumps.
text: In amphibians and most reptiles, a double circulatory system is used, but the heart is not always completely separated into two pumps.
text: In amphibians and most reptiles, a double circulatory system is used, but the heart is not always completely separated into two pumps.