1.

Which of the following is the correct statement about the circulatory system of cockroachA. It is closed type of circulatory systemB. It is a complicated type of circulatory systemC. It takes place without the participation of tissueD. It has 13 chambered heart and in each segment one pair of ostia are present

Answer» Correct Answer - D
The heart of cockroach is pulsatile and formed of 13 inverted funnel-shaped segmental chamber, each chamber (except last one) has a pair of apertures called ostia which open into the pericardial sinus.


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