What type of breathing is characterized by the contraction of the abdominal muscles?

The type of breathing characterized by the contraction of the abdominal muscles is forced expiration. During forced expiration, the diaphragm and external intercostal muscles relax, and the abdominal muscles contract. This contraction increases intra-abdominal pressure and helps to push air out of the lungs more forcefully, typically during activities like heavy exercise, coughing, or yelling. This mechanism allows for a rapid and efficient expulsion of air from the lungs, clearing the airways or allowing for more vigorous ventilation. Understanding the mechanics of forced expiration is essential for recognizing how our bodies adapt to various physical demands and activities.