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Question

In cockroach the flow of haemolymph is

  1. Heart -> head haemocoel --> perivisceral sinus -->pericardial sinus -->ostia
    -->heart
  2. Heart -->pericardial sinus--> head haemocoel --> perivisceral sinus--> ostia -->heart
  3. Heart -->head haemocoel -> previsceral sinus -->ostia -->pericardial sinus -->heart
  4. Heart -->ostia -> perivisceral sinus -->pericardial sinus -> head haemocoel
    -->heart

A
Heart -->ostia -> perivisceral sinus -->pericardial sinus -> head haemocoel
-->heart
B
Heart -->pericardial sinus--> head haemocoel --> perivisceral sinus--> ostia -->heart
C
Heart -> head haemocoel --> perivisceral sinus -->pericardial sinus -->ostia
-->heart
D
Heart -->head haemocoel -> previsceral sinus -->ostia -->pericardial sinus -->heart
Solution
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-->heart

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