The pulmonary ligaments serve to hold the lower part of the lungs in position.
2.
The lower end of this is sometimes referred to as the " inferior pulmonary ligament ".
3.
The parietal pleura surrounding the root of the lung extends downwards from the hilum in a fold called the "'pulmonary ligament " '.
4.
There is a groove for the esophagus behind the hilum and the pulmonary ligament, and near the lower part of the esophageal groove is a deeper groove for the inferior vena cava before it enters the heart.