Question

Describe briefly about the circulatory system of cockroach.

Answer 1

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Cockroaches are equipped with open type circulatory system. In this, blood is pumped by heart and flows open in body cavity. Organs floating in blood get nutrition directly. Supply of oxygen is independent through a separate closed type respiratory system.

To make it more explicit, the circulatory system of cockroaches is primitive consisting of only heart and primary artery. Contrary to higher animals the oxygen supply is not dependent on circulatory system. For this there is a well developed closed respiratory system for assured exchange of gases directly by the tissues.

Answer 2

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Ans is :-

Cockroaches have blood vascular system with poorly developed blood vessels which open into a haemocoel or open body space. *Visceral organs are immersed in haemolymph or blood of cockroach. ... *Longitudinal section of the cockroach shows a long muscular tube lying in the mid-dorsal side of the body called as heart.

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