1) 4 chambers of the heart
2) Aorta
3) blood vessels
4) capillaries
5) blood
6) veins
Aorta.
your heart and brain
the heart is part of the circulatory system in the body.
brain and heart
The heart and blood vessels are the main organs of the circulatory system. The lungs are part of the respiratory system.
The heart, lung, and the blood vessel
An artery is a part of the circulatory system, the main organ could be considered the heart
The two main parts are the heart and the blood vessels
The heart, veins, arteries, capillaries, and the blood are the 5 main parts of the cardiovascular system.
Main Parts: Liver Kidney Heart Intestines Brain
That would have to be the heart
It is the sequel of Part 3, also the prequel of Part 5.