Which of the following is the correct statement about the circulatory system of cockroach

Options

A. It is closed type of circulatory system
B. It is a complicated type of circulatory system
C. It takes place without the participation of tissue
D. It has 13 chambered heart and in each segment one pair of ostia are present

Answer

D

Explanation

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.