The heart.
heart
The term cardio refers to the heart. The medical word cardiac was derived from the Greek word for heart, which was kardia.
It is an organ. The heart belongs to cardio-vasculary organ system.
Yes
The brain.
The heart is the main pumping machine of the cardio vascular system. The calf muscles also helps to pump venous blood towards the heart
heart because if heart is not present in body brain will not get blood and if brain will not get blood it will damage
heart because if heart is not present in body brain do not get blood and so brain will damage
HEY.
The heart is the organ in your chest that blood is pumped in and out of, and the brain is the organ in your head that controls everything you do (center of the nervous system)
brain
i believe it is the circulatory and the cardio-vascular systems cardiovascular or circulatory
i htink its the heart