alleryIn a cockroach, haemolymph directly bathes organs in the haemocoel. Its circulation is:
AClosed, with a ventral heart
BClosed, with a dorsal heart
COpen, with a dorsal heart
DOpen, with a ventral heart
Answer & Solution
Correct answer: C. Open, with a dorsal heart
Cockroach circulation is open: haemolymph bathes visceral organs in the haemocoel. Its elongated heart lies along the mid-dorsal line.
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