A) 6-chambered
B) \[9-\] chambered
C) 29-chambered
D) 13-chambered
Correct Answer: D
Solution :
Heart of cockroach consists of 13 funnel shaped chambers or segments, each communicating by a valvular opening with the one in front of it. Haemolymph circulates by the contraction and relaxation of heart assisted by the alary muscles. The haemolymph or blood of cockroach consists of a clear colourless plasma
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