title: A PRIMITIVE HEART IN THE ECHINOID STRONGYLOCENTROTUS PURPURATUS.
abstract: A pulsating vessel and a compartmented contractile chamber have been found to move coelomic fluid from the perivisceral cavity into and throughout the hemal system of the sea urchin, Strongylocentrotus purpuratus.
mesh_terms: D000818:Animals; D001826:Body Fluids; D004447:Echinodermata; D006653:Histology; D006358:Hot Temperature; D012106:Research; D012617:Sea Urchins; D047270:Strongylocentrotus purpuratus
keywords: ECHINODERMATA; EXPERIMENTAL LAB STUDY; HEAT; HISTOLOGY