Two halves make whole :)
Technically your heart has 4 chambers, so 4 quarters. Answer
It is because your heart is two pumps in one package.
The right side of the heart, which contains an atrium and a ventricle, pumps oxygen-depleted blood to the lungs for oxygenation, through the pulmonary artery. That artery is the only artery in the body that carries venous or "blue" blood. The left side of the heart, which contains a separate atrium-ventricle unit, pumps oxygenated blood ("scarlet" blood) out to the various parts of the body.
Septum
And the ventricle.
The heart has two halves because one half pumps oxygen and the other carbon dioxide. Et voilà!
1/2 is oxygenated.
Two halves make a whole. Or You have two halves!?
Two halves of a circle and a V at the bottom.
Zero!
There are four halves in two wholes. Each whole is made up of two halves, so when you multiply two wholes by two halves per whole, you get four halves in total.
Septum. Between the two atria is the Atrial Septum and between the two ventricles is the Ventricular Septum.
The heart is divided by a partition or septum into two halves. The halves are in turn divided into chambers. The upper two chambers of the heart are called atria and the lower two chambers are called ventricles. The atria receive blood returning to the heart from the body and the ventricles pump blood from the heart to the body. Valves allow blood to flow in one direction between the chambers of the heart.
(0.5+0.5)−(0.5+0.5)=0 Bear in mind that two halves make a whole.
The diameter of a circle divides it into two halves