Pulmonary Sac

The pulmonary sac is an organelle in the lungs that is responsible for gas exchange in the body. It consists of many small alveoli, which are connected by thin walls. Each alveolus contains a small amount of blood in which gas exchange occurs between oxygen and carbon dioxide.

The pulmonary sac has a very important function in the human body. If it doesn't work properly, many health problems can arise, such as chronic obstructive pulmonary disease