Final answer:
The question is about the muscles in the abdominal wall and their actions.
Step-by-step explanation:
The subject of this question is Biology and the grade is High School. The question is related to the muscles in the abdominal wall and their actions.
The external oblique, internal oblique, and transversus abdominis are the three flat muscles in the antero-lateral wall of the abdomen. The external oblique extends inferiorly and medially, the internal oblique extends superiorly and medially, and the transversus abdominis is arranged transversely around the abdomen. These muscles allow various movements and rotations of the trunk and also help protect the internal abdominal organs.
The grade of this question is High School because it requires knowledge of the anatomy and function of the abdominal muscles. The detailed answer provides information about the specific muscles involved, their orientation, and their functions. Learning about these muscles is important in understanding the movements and stability of the trunk.