What does the prefix "pneumo-" relate to in medical terms?

The prefix "pneumo-" is derived from the Greek word "pneuma," which means "air" or "breath." In medical terminology, it specifically refers to anything related to air or the lungs. This prefix is commonly used in terms such as "pneumonia," which relates to inflammation of the lungs and is often caused by an infection that affects the air passages. Similarly, "pneumothorax" describes a condition where air enters the space between the lungs and the chest wall. Understanding the significance of this prefix is important for comprehending various medical conditions and terms associated with respiratory health and the function of air in the body.