Blood Flow through the Heart: Using the heart model or other visual aids provided by your instructor, determine the direction of blood flow through the chambers, vessels and valves of the heart and lungs. Summarize your findings below beginning with oxygen-poor blood from the body entering the heart and ending with oxygen-rich blood leaving the heart to re-supply the body. 1. Vena cavas 2. Right atrium (vessels) 8. (vessels) (chamber) 9. (chamber) 3. (valve) 10. (valve) 4. (chamber) 11. (chamber) 5. 6. (valve) 12. (valve) (vessels) 13. (vessel) 7. Through the lungs (O2 picked up) 14. Through the body (O2 released)