heart, blood and blood vessels
i believe so
the main organ of the muscular system is the muscles
the heart is part of the circulatory system in the body.
The Heart is the main organ of a circulatory system.
The main organ in the muscular system is the muscles.
No veins or arteries. Insects have them.
Yes the kidney is the main organ in the urinary system as well as the bladder.
The main organ of the blood transport system in a mammal is the heart.
Another name for the cardivascular system is cirulatory system.
The main organ in the respiratory system the lungs.
They dont have a cirulatory system at all .
Another name for the cardivascular system is cirulatory system.