rest.
Veins
Vein
veins, but technically, they are not part of the heart.
The inferior vena cava brings blood back to the heart from the lungs.
MAYBE
Brings deoxygenated blood back to the heart from the body
by breathing more
The superior and inferior vena cava.
Mainly b/cit takes a little while to recover, and during that time your heart rate and breathing will be a bit elevated.
The chemicals in the body even out to the before state therfore putting the body back in its usual state.
it is the main vein of the body it brings deoxygenated blood back to the heart
There are a few. The superior vena cava and inferior vena cava brings deoxygenated blood from the body to the heart. The pulmonary vein brings back oxygenated blood from the lungs to the heart. There are also veins that bring back deoxygenated blood that supplied the heart such as the coronary vein.