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Open Circulatory System

Heart of cock...

Question

Heart of cockroach is:

A

dorsal

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B

ventral

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C

non-contractile

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D

absent

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Solution

The correct option is D
absent

Heart of cockroach consists of elongated muscular tube lying along mid dorsal line of thorax and abdomen. It is differentiated into funnel shaped chambers with ostia on either side. Blood from sinuses enter heart through ostia and is pumped anteriorly to sinuses again.

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