Search   in
between years and
On the heart and circulation in doliolids (Tunicata: Thaliacea)
Q. Bone, J.C. Braconnot and C. Carré

The doliolid heart is briefly described: despite the absence of closed vessels, it produces an efficient circulation along defined paths within the haemocoel. When it reverses, the flow follows the same paths in reverse. There are very few cells within the haemocoel fluid, but the movements of the occasional cell permit entry velocity to the heart to be measured, and intracardiac pressures of some 2Pa to be calculated. Heart volume is around 0.15% of that of the haemocoel.

Contents of this volume Sci. Mar. 61(2) : 189-194 Back PDF
Please, send comments to
ICM (CSIC) - Passeig Marítim de la Barceloneta, 37-49. E-08003 Barcelona (Spain)