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.
Stomach bloating is caused by gas that gets trapped in the intestines and colon. It is normal for the digestive tract to produce gas. Everyone gets gas that gets processed through the mouth and rectum. That gas is produced in the body either by ingesting it when we eat or by being formed during digestion.