Main Blood Vessels in the Body
- Blood is carried away from the heart and towards organs in arteries
- These narrow to arterioles and then capillaries as they pass through the organ
- The capillaries widen to venules and finally veins as they move away from the organs
- Veins carry blood back toward the heart
Circulatory System Diagram
The circulatory system
Important blood vessels table
| Organ | Towards organ | Away from organ |
| Heart | Vena cava, pulmonary vein | Aorta, pulmonary artery |
| Lung | Pulmonary artery | Pulmonary vein |
| Kidney | Renal artery | Renal vein |
| Liver |
Hepatic artery Hepatic portal vein (from the intestines) |
Hepatic vein |
