Open ciruclartory system is not of physiological hindrance in Cockroach because

Options

A. Heart is simple but chambered
B. Blood is colourless
C. Circulatory and respiratory systems are not connected
D. Excretion occurs through malpighian tubules

Answer

C

Explanation

As in cockroach circulation of blood is not through respiratory pigment but by the fine network of tubes called trachea.