Of about 3-4 days in most cases. With severe damage it can take up to 30.
A person who specializes in the study of animals is called a zoologist. Zoologists who study certain kinds of animals have their own names.
The human race may survive through survival of the fittest. basically whoever has the biggest stick wins! The body also could adapt to the lack of water so you could preserve your bodily resources and manage them better. Or you could just change the environment to benefit yourself and mankind!
Minerals
Explanation:
Minerals can be found in the cactus and ground and are very resourceful