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The Stomach of a Snake
If you ever watched a snake move across the ground, it appears that this animal
just sort of slides along. The truth is, instead of sliding along, most snakes are really pushing off against the ground using a special adaptation.
If you look on snakes' bottom sides, you'll find that most have a series of long scales across their bellies that look almost like the treads on the bottom of your sneakers. These scales, which are very different from the ones found along their sides and back, increase the friction between the snake and ground, allowing them to "get a grip."
They then use their stomach muscles to pull themselves along.
