What is the route of an rbc traveling from heart to left elbow and back heart?

The route of an RBC travelling from the heart to the left elbow and back to the heart is as follows:

1. The RBCs are pumped out of the left ventricle of the heart into the aorta, the main artery of the body.

2. The aorta branches into several arteries, including the brachial artery, which supplies blood to the left arm.

3. The brachial artery travels down the arm and branches into smaller arteries, including the ulnar and radial arteries, which supply blood to the hand and forearm.

4. The capillaries are tiny blood vessels that connect the arteries to the veins. The RBCs squeeze through the capillaries and deliver oxygen and nutrients to the tissues of the arm.

5. The deoxygenated RBCs are collected by the venules, which are small veins. The venules merge to form larger veins, including the ulnar and radial veins, which carry the blood back to the heart.

6. The ulnar and radial veins merge to form the brachial vein, which travels up the arm and joins the axillary vein in the armpit.

7. The axillary vein becomes the subclavian vein, which carries the blood from the left arm back to the heart.

8. The subclavian vein joins the superior vena cava, which is a large vein that returns blood from the upper body to the heart.

9. The superior vena cava empties into the right atrium of the heart.

10. The blood then flows from the right atrium to the right ventricle.

11. The right ventricle pumps the blood out of the heart and into the pulmonary artery, which carries the blood to the lungs.

12. In the lungs, the blood picks up oxygen and releases carbon dioxide.

13. The oxygenated blood returns to the heart via the pulmonary veins.

14. The pulmonary veins empty into the left atrium of the heart.

15. The blood then flows from the left atrium to the left ventricle, completing the circuit.