👉 The atm veins are the veins that carry blood from the lungs back to the heart. They are part of the pulmonary circulation system, which transports deoxygenated blood from the lungs to the right atrium of the heart. After receiving deoxygenated blood from the body, the blood passes through the pulmonary veins to the left atrium. These veins are unique in that they carry oxygen-rich blood and do not have valves, unlike other veins in the body.
