What makes the snake's skin so elastic?

I've just seen a video of a snake swallowing a whole ostrich egg. It stretched its mouth and skin to more than 5 times its original size. What makes its skin so elastic? And when again it regains its original size, it looks perfectly tight. What makes its skin so elastic? Is there anything to do with its genes? And is there any chance that these genes can be used to make human skin tight and elastic so that no wrinkles form on the skin?
What makes the snake's skin so elastic?
The skin is covered in scales. Most snakes use specialized belly scales to move, gripping surfaces. The body scales may be smooth, keeled, or granular. Their eyelids are transparent "spectacle" scales which remain permanently closed. They shed their skin periodically. Unlike other reptiles, this is done in one piece, like pulling off a sock. It is thought that the primary purpose of this is to remove external parasites. This periodic renewal has led to the snake being a symbol of healing and medicine, as pictured in the Rod of Asclepius. In "advanced" (Caenophidian) snakes, the broad belly scales and rows of dorsal scales correspond to the vertebrae, allowing scientists to count the vertebrae without dissection. If there is not enough humidity in the air while snakes are shedding their skin, it can be very dangerous for the snake, because the dry skin does not shed. Skin that remains attached to the snake can harbour diseases and parasites. A tail tip that is not removed can constrict as the snake grows, cutting off the blood supply to the end of the tail causing it to drop off. A retained spectacle can cause the snake to become blind in the affected eye.
What makes the snake's skin so elastic?
I'd imagine it has to do with the fact that snakes have scales and not skin, so I'd doubt that there's any useful gene type stuff in there for us, not unless you want scales...
Reply:i have no idea besides i hate snakes