Actually by swimming a person can easily burn more than 450 calories upto 920 calories per an hour. So, burn less than 400 calories per hour is not correct regarding swimming.
Glucose is essential for energy in all the living organisms. When we have more glucose than needs in our bloodstream, then the excess glucose is stored as large compounds as Glycogen. This glycogen fills the cells of the liver and available for any quick shots of energy.
Hence, Liver is called as warehouse for the excess glucose.
Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur rubber much stronger, more flexible, and more resistant to heat and other environmental conditions.