Lung endothelial cells are a type of cells that line the blood vessels in the lungs and play a crucial role in maintaining the barrier function of the blood vessels in the lung tissue. These cells help regulate the exchange of gases and nutrients between the blood and the surrounding tissues, and are also involved in inflammation, immune response, and other physiological processes in the lungs. Research in this area focuses on understanding the functions and behaviors of lung endothelial cells, how they interact with other cells in the lung tissue, and how dysfunction of these cells can contribute to lung diseases such as pulmonary hypertension, acute respiratory distress syndrome, and others. Studying lung endothelial cells can provide insights into the underlying mechanisms of lung diseases and help develop potential new treatments.