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Pericardial sinus

Space, bounded ventrally by a pericardial membrane, within which the heart lies. [Holdich and Jones, 1983]
(Taxon-specific: Order Anostraca) In circulatory system, elongate cavity surrounding heart. Blood collects within sinus and enters heart through ostia; separated from underlying hemocoel by pericardial septum. [Stachowitsch, 1992]
(Taxon-specific: Order Cumacea) Cavity surrounding heart. Blood collected in pericardial sinus enters heart via ostia.
(syn. pericardium) [Stachowitsch, 1992]
(Taxon-specific: Order Tanaidacea) Cavity surrounding heart. Blood collected in pericardial sinus enters heart via ostia.
(syn. pericardium) [Stachowitsch, 1992]
(Taxon-specific: Order Decapoda) Cavity surrounding heart. Blood, coming from gills, collects in pericardial sinus and enters heart via ostia.
(syn. pericardial sac, pericardium) [Stachowitsch, 1992]
(Taxon-specific: Order Amphipoda) Cavity surrounding heart. Elongate, often extending beyond heart as far posteriorly as telson. Blood collected in pericardia! sinus enters heart via ostia.
(syn. pericardium) [Stachowitsch, 1992]
(Taxon-specific: Order Isopoda) Cavity surrounding heart. Blood collected in pericardial sinus enters heart via ostia.
(syn. pericardium) [Stachowitsch, 1992]
(Taxon-specific: Order Mysida) Cavity surrounding heart. Blood collected in pericardial sinus enters heart via ostia.
(syn. pericardium) [Stachowitsch, 1992]
(Taxon-specific: Order Euphausiacea) Cavity surrounding heart. Blood collected in pericar-dial sinus enters heart via ostia.
(syn. pericardium) [Stachowitsch, 1992]