Final answer:
The pulmonary root is the part of the circulatory system related to the lungs. It consists of the pulmonary artery and pulmonary veins that carry blood to and from the lungs for oxygenation.
Step-by-step explanation:
The pulmonary root is a term used in biology to refer to the part of the circulatory system related to the lungs. It specifically refers to the blood vessels that carry blood away from the heart to the lungs for oxygenation. The pulmonary root consists of the pulmonary artery, which branches off from the right ventricle of the heart and carries deoxygenated blood to the lungs, and the pulmonary veins, which return oxygenated blood from the lungs back to the left atrium of the heart.