The heart wall.
veins, but technically, they are not part of the heart.
The heart an the veins
Arteries and veins. They are Tubes which take blood to and from the rest of the body.
It is caused by the veins in the heart open and close
It is caused by the veins in the heart open and close
the aorta
Veins and Arteries move the blood throughout your body which are part of the Respiratory System with the help of the heart pumping the blood.
Circulatory system and Cardiovascular system
the two kinds of large veins are: 1. superior vena cava- upper part of the heart 2. inferior vena cava- lower part of the heart
I'm not sure veins maybe
The atria
it supplies the heart and the brain