The circulatory pathways are separated into:
- Pulmonary circulation indicated white arrows.
- Systemic circulation indicated by black arrows.
The different parts labeled in the diagram are:
- Capillaries of head and arms
- Superior vena cava
- Capillaries of right lung
- Pulmonary vein
- Inferior vena cava
- Capillaries of abdominal organs and legs
- Capillaries of left lung
- Pulmonary artery
- Aorta