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
The two main parts are the heart and the blood vessels
An artery is a part of the circulatory system, the main organ could be considered the heart
Main Parts: Liver Kidney Heart Intestines Brain
That would have to be the heart
There are two pacemakers in the heart. One (which is the main pacemaker of the heart) can be found in the upper right-most part of the right atrium and the other one can be found in the center most part of the heart, inside the atrio-ventricular wall.
Because it is the pump that drives the blood throughout the body.
The main part of the circulatory system is the heart. It pumps blood throughout the body, delivering oxygen and nutrients to cells and removing waste products. The circulatory system also includes blood vessels like arteries, veins, and capillaries that help transport blood to different parts of the body.