The abdominal wall is a structure that surrounds and protects the abdominal cavity, which contains vital organs such as the stomach, liver, and intestines. It is made up of layers of muscles, connective tissue, and skin, providing support and maintaining the shape of the abdomen. The main muscles of the abdominal wall include the rectus abdominis, external obliques, and internal obliques. These muscles play a crucial role in movements like bending and twisting, as well as in maintaining posture and stability during physical activities.