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Q.

In cockroach, blood flows through ostia from the

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a

Heart into the pericardial sinus

b

Pericardial sinus into the heart

c

Head sinus into the perivisceral sinus

d

Perivisceral sinus into the pericardial sinus

answer is B.

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Detailed Solution

Each heart chamber has a pair of ostia. Ostia are valvular and allow blood to flow only from the pericardial sinus into the heart.

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