Simplify the following text for a Grade 6 native English-speaking person.
Original: This can be loosened and tightened at will , and if the animal wants to squeeze through a small gap , it can essentially liquefy its body and pour into the space .
Simplified: This can be loosened and tightened at will . If the animal wants to squeeze through a small gap , it can undo the collagen connections , and pour into the space .