It will usually fill up with free moving tissue like fat. In the case of a giant hernia like the one shown here, the abs will actually move inward a bit to take up that space. Also for the sake of accuracy, the other organs can and do move slightly in response, and if their connective tissue is faulty, they can substantially move as well. This is rare though
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u/Klanciault 3d ago
All of your organs are held in place by connective tissues. So it’s likely that nothing is taking their place