The respiratory system relies on the blood to distribute oxygen throughout the body. This relationship is essential to survival. The circulatory system dedicates arteries to this purpose. The pulmonary arteries stretch directly from the right side of the heart to the lungs. The lungs must receive a large amount of blood to effectively perform their important work.

magicmine / Getty Images
This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.