there are three chambers to the lungs and to listen to all of them efficiently-the dr has to put the stethoscope in 4 different places. once on your upper back (near your shoulder blades), once on the sides of your waist, once on your lower back and then in the front at the center of your chest which is close to your heart.
Chewing gum can also lead to swallowing air, which can cause bloating. If you've got a gum habit, alternate chewing gum with sucking on a piece of hard candy or eating a healthy, high-fiber snack like fruit, vegetables, or lower-fat popcorn.
They can be caused by something as simple as swallowing air or eating the wrong foods. Less often, gas and bloating are signs of something imminently more serious, ranging from intestinal disorders to potentially life-threatening malignancies in the lower digestive tract, such as colorectal cancer. Common Causes of Gas and Bloating The two main causes of gas are swallowed air and the breakdown of food that leads to the production of gas. The latter is especially true when foods are high in sugar, starch, or fiber.