Blood circulation in cockroach :
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Answer:
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 systemA cockroach has one heart, but the heart may have as many as 13 chambers {compared to 4 in the human heart..left & right atrium, L & R ventricle}. It's heart is tube shaped, And, it's heart can STOP, without the cockroach dying.
In the abdomen, the dorsal vessel is called the heart, which is divided into chambers separated by small valve-like openings called ostia, through which blood enters the heart. Each chamber has a pair of alary muscles which expand and contract to facilitate the flow of haemolymph through the heart
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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.
Explanation: