Assertion: grasshopper's organ | /r/CapableOf | call dorsal vessel
Facets:
Source sentences:
text: The one closed organ, called the dorsal vessel, extends from the hind end through the thorax to the head; it is a continuous tube with two regions, the heart or pumping organ, which is restricted to the abdomen, and the aorta, or conducting vessel, which extends forward through the thorax to the head.