Question

Circulatory system in cockroach is open type give reason

Answer 1

This is because cockroach lie in the category of arthropods which are primitive type of organisms.

Explanation:

The reasons for this are as follows:-

1. Cockroaches do not depend on their heart or blood for the transportation of oxygen in their body.
2. They have well developed network of trachea for the above process.
3. Moreover, their blood is the mixture of blood and intestinal fluid which flows around the organs.

Thus due to lack of evolution of developed closed circulatory system in them , they survive and fulfill the need of oxygen for body by another developed system.