06/06/2026
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Muscles of the abdominal wall are layered — 4 different muscles with 4 different fibre directions. They work in perfect coordination, but still there has to be a gliding interface between them, allowing them to work through all combinations of action during movement.
P.S. As my page is again in trouble for not following some standards, and it is not recommended by FB, so for you to see it you need to like it or comment on my post.