Drawing abs is a skill that can be learned with practice. By understanding the basic anatomy of the abdominal muscles, you can create realistic and convincing abs in your drawings.
The abdominal muscles are a group of muscles that run along the front of the abdomen. They are responsible for flexing the spine, rotating the torso, and compressing the abdominal cavity. The most visible abdominal muscles are the rectus abdominis, which run vertically down the center of the abdomen, and the external obliques, which run diagonally across the abdomen from the ribs to the pelvis.