Discuss the respiratory system or circulatory system of frog.

Frog respiratory system || circulatory system

Describe circulatory system of frog

Explain the circulatory system of frog.

The circulatory system of cockroach

In closed circulatory system

Cock roach || morphology OF abdomen || digestive system || respiratory system || excretory || circulatory system

Explain the effect of tobacco smoke specifically on the respiratory or circulatory system.

What is closed circulatory system?