Question

Is open circulatory system present in cockroaches?

Answer 1

Open circulatory system:

1. Open circulatory system is mostly found in invertebrates.
2. In the open circulatory system, the blood flows independently through cavities as it lacks blood vessels.
3. Here, the hemolymph directly bathes the organs and tissues.
4. The interstitial fluid and blood cannot be distinguished in the open circulatory system.
5. Blood is pumped into the cavity of the body.
6. Nutrients are exchanged directly between tissues and blood in the open circulatory system.
7. The open spaces are called sinuses and lacunae.

Circulatory system in cockroaches:

1. Cockroaches have an open circulatory system.
2. They lack blood vessels and capillaries.
3. The blood is present in spaces called hemocoel.
4. The visceral organs bath in the hemocoel.