Circulatory system in cockroach is
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Open Circulation System in Cockroach. The heart of the cockroach is elongated, thick, muscular, tubular and 13-chambered. It lies in the pericardial sinus of the haemocoel. Each chamber of the heart receives oxygenated blood from the dorsal sinus through one pair of slit like openings called ostia.
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Cockroach belongs to the arthropoda groups. It have the open circulatory system.
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