What is the number of layers in the abdominal wall?

The abdominal wall is comprised of three main layers that contribute to both its structure and function. The outermost layer is the skin, followed by the subcutaneous fat layer, which serves as insulation and padding. Beneath these, the muscular layers include the external oblique, internal oblique, and transversus abdominis. Together, these layers provide support for the abdominal organs, allow for movement, assist in posture, and play a crucial role in respiration and intra-abdominal pressure regulation. Understanding these three layers forms a foundational knowledge for further studies in anatomy and physiology, making it clear why three layers is the correct answer.