Heart of cockroach is a

Membranus

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Muscular and tube like

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Absent

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Filled with blood having RBC

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Solution

The correct option is B Muscular and tube like
A) The heart is not membranous.
B) The heart is an elongated muscular tube lying along the mid-dorsal line of the thorax and abdomen.
C) A muscular heart with thirteen chambers is present.
D) The blood of cockroaches consists of clear colourless plasma and cells called haemocytes. RBCs are absent. The blood is devoid of any pigments.
So the correct answer is 'Muscular and tube like'.

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