If humans are mostly water, what happens when you remove it?

This was the idle yet macabre thought that raced through Remdrick's brain as he performed routine maintenance on his vehicle. It may not have been the most current model, but Remdrick's needs were few. It needed to be space-worthy, it needed to have ample power, an electronic library, and living quarters sufficient for him and his pet. Though if she died during the nearly 120 year-long trip, he wanted a way to preserve the body- it would be nice to bury Mildred on the new homeworld. As things stood though, he would probably have to settle for space-disposal. Humans only lived roughly a hundred years in captivity, and Mildred was already almost 25. Oh, well.

He knew she loved him. She was a very good girl. She always came when he called, she was always neat about her business, and she rarely had any health problems. He finished working on the vehicle and considered buying her a new toy. A ball might be nice.