And when a force is applied onto the aggregate, that basically forces all these water molecules to leave this section. And that basically slightly deforms this agricent protein molecule, the proteoglycan. And when this is essentially deformed, it absorbs some of that force. Now, as soon as that force, as soon as that pressure is released, these water molecules will rush right back. Why? Well, because water will tend to move down its concentration gradient from a high to a low concentration.