Zoology - Structural Organisation in Animals Question with Solution | TestHub

The circulatory system of cockroach:

- It is an open type. Blood vessels are poorly developed and open into haemocoel or open spaces.

- Body fluid present in hemocoel is also known as hemolymph.

- Blood is colorless as there is no respiratory pigment.

- Blood doesn't perform the function of transporting gases.

- Cockroach possesses 13- chambered tubular, muscular, elongated and neurogenic heart.

- Blood circulation in cockroach is maintained by wing-shaped alary muscles (involuntary).