What is the flow of blood from heart to the brain?

Pulmonary veins are oxygen rich and deliver it along with nutrients to the body's organs, after the blood has delivered the goods then it is drained back to the heart by the arteries. Then the blood is carried back to the lungs to the alveoli for gas exchange leave carbon dioxide we breathe out and pick up new oxygen and starts over again.

Blood flow goes as follows:

1. left atrium

2. mitral (bicuspid) valve

3. left ventricle

4. aortic semilunar valve

5. aorta

6. brachiocephalic trunk

7. common carotid arteries

8. internal carotid artery

9. anterior and middle cerebral arteries

10. Circle of Willis

11. venous sinuses internal jugular vein

12. right brachiocephalic vein

13. superior vena cava

14. right atrium

15. tricuspid valve

16. right ventricle

17. pulmonary semilunar valve

18. pulmonary trunk

19. pulmonary artery

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