The depiction of an event late in the game was inspired by Crisis Core: Final Fantasy VII, a storyline tying into the opening of Final Fantasy VII. Ifrit's throne resembles the throne Chaos sits in in a concept art piece by Yoshitaka Amano. for the original Final Fantasy.
The blood first enters the heart into the right atrium. Blood passes from the right atrium through the tricuspid valve and into the right ventricle. When the right ventricle contracts, the muscular force pushes blood through the pulmonary semilunar valve into the pulmonary artery. The blood then travels to the lungs, where it receives oxygen. Next, it drains out of the lungs via the pulmonary veins, and travels to the left atrium.
The Right ventricle feeds the Pulmonary artery through the pulmonary valve. There is no connection between them apâ¦art from, of course, that the blood flows out of the right ventricle through the pulmonary system (the lungs) and back via the pulmonary veins into the left atrium and then the left ventricle. The 2 heart pumps (ventricles) are in series, not in parallel.