👉 Pneumatogenic is a medical term used to describe an organ or tissue that undergoes growth and development in response to external stimuli, such as pressure. It is often associated with the lungs, where it refers specifically to the air sacs lining these organs. This type of growth is known as angiogenesis and is characterized by the formation of new blood vessels within the lung parenchyma (the capillaries and other small vessels that support the lungs).