Ans: Breathing, digestion, posture, and equilibrium, as well as movement, are the main functions of the abdomen. The digestive system is made up of all of the main organs in the abdomen. The accessory muscles of respiration depend heavily on the abdomen for breathing. Postural help, coordination, breathing, coughing, urination, crying, humming, defecation, and reproduction are all aided by these muscles. The abdomen also helps in respiration and maintaining movement and posture. A detailed explanation of how the abdomen helps in respiration and maintaining the posture of our body is given below. Respiration: Under steady-state conditions, the diaphragm is known to control respiration, the accessory muscles of respiration help in respiration when a greater effort is required for breathing. The scalene and the sternocleidomastoid muscles are the muscles that serve to raise the ribcage. Whenever these muscles are engaged, it is a sign of respiratory distress, such as the one that is observed during an asthma attack. Movement and Posture: The abdominal muscles are essential for maintaining posture, body balance, and movement. The internal obliques and abdominis muscles have a significant impact on posture since they provide spinal stability during rotation and lateral flexion, as well as stabilizing the spine while an individual is standing. All of these muscles are found deep inside the abdominal cavity. When standing, the external oblique muscles are also considered to assist lateral flexion and spine stabilization. The primary feature of the rectus abdominis is to assist the spine in bending over.