Trace the pathway of blood from the vena cava, through the heart to lungs, back through the heart, and out

Trace the pathway of blood from the vena cava, through the heart to lungs, back through the heart, and out. Indicate all chambers, valves, and blood vessels connected directly to the heart. Indicate where blood is oxygenated and where needing more oxygen. Feel free to draw a picture and scan it in, if that fits your learning style better.