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(B) The heart of a cockroach consists of an elongated muscular tube lying along the mid-dorsal line of the thorax and abdomen. It is differentiated in

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It is situated along the mid-dorsal line of the thorax and abdomen.

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(B) The heart of a cockroach consists of an elongated muscular tube lying along the mid-dorsal line of the thorax and abdomen. It is differentiated into $13$ funnel-shaped chambers with ostia on either side. Blood from sinuses enters the heart through these ostia and is pumped anteriorly to the sinuses again. Option $B$ is incorrect because the heart is located along the mid-dorsal line,not the mid-ventral line.

Column-$I$	Column-$II$
$P$. Testes	$I$. $2$nd to $6$th segments
$Q$. Mushroom gland	$II$. $6$th to $7$th segments
$R$. Ovaries	$III$. $6$th segment
$S$. Seminal vesicles	$IV$. $4$th to $6$th segments

Select the incorrect statement regarding the heart of a cockroach.

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Match the following columns regarding the reproductive system of a cockroach:
Column-$I$ Column-$II$
$P$. Testes $I$. $2$nd to $6$th segments
$Q$. Mushroom gland $II$. $6$th to $7$th segments
$R$. Ovaries $III$. $6$th segment
$S$. Seminal vesicles $IV$. $4$th to $6$th segments

Describe the reproductive system of a cockroach in detail.

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