King (Or Queen?) of compassion.

King (Or Queen?) of compassion. In a way the heart is like a benevolent monarch. All its life, the sincere organ gives life blood to all the other organs os the body. If it stops, its dependent organs will suffer and eventually die. But what about blood supply to the...

How does it come back?

How does it come back? The walls between the two atria and the two ventricles separate the oxygen-rich blood from the oxygen-poor blood. Any defects or holes in the walls leas to mixing of blood and causes illness. Such defects are usually present from birth and need...