How does water give the human body energy?

Question

Water is necessary for life. Why?

Answer 1

water is sort of like the back bone for many chemical reactions needed to support life that is why its necessary.

Answer 2

In plants, CO2 is combined with water in photosynthesis to make glucose, the main source of energy for all living beings.  Humans get this glucose from either eating the plants directly or eating animals that have eaten plants.  In the body, when cellular respriation occurs, the glucose is "burned" (combined with oxygen) and the water and CO2 are released.  This breaking of glucose into water and carbon dioxide powers the mechanism by which ATP is made, which is essentially energy for the body.

Answer 3

Because without water you'd die of dehydration.

Answer 4

Generally, water is the best medium for chemistry; it allows confluence thereby making contact efficient and does not include its self absolutely.

Answer 5

Water as a form of matter have many uses, one of these is

to provide body fluid and to help regulate body temperature.Water can be considered the most important dietary constituent.A normal man or woman can live without food for 20 to 40 days, but without water humans die in four to seven days. Over 60 percent of human body weight is made up of water, of which approximately 61 percent is intracellular and the rest extracellular. Water intake, except under exceptional circumstances (e.g. intravenous feeding), comes from the food and fluids consumed. The amount consumed varies widely in individuals and may be influenced by climate, culture and other factors. Often as much as 1 litre is consumed in solid food, and 1 to 3 litres as fluids drunk. Water is also formed in the body as a result of oxidation of macronutrients, but the water thus obtained usually

constitutes less than 10 percent of total water.

Water is required for the distribution of nutrients, electrolytes, hormones, and other chemical messengers throughout the body, as well as the removal of waste products. Water is involved in cellular energy production and the maintenance of body temperature. It is also an important structural component of skin, cartilage, and other tissues.When we eat, breathe, and use our muscles, our body creates residue waste products that the body has to get rid of.  Good clean water helps us do this.  Without enough water we do not get rid of these waste products?  The waste products that we do not discard have to be stored somewhere within our body.  

Water is closely connected to fat gain and loss.  This has nothing to do with water retention.  Water doesn't have any calories, but.....When the body begins to run low of any vital nutrient -- even water -- it will trigger hunger to motivate you to go get some more of whatever it needs.  This is true for water because most foods provide some amount of water.  It can, however, provide many unneeded calories.   The thirst sensation is not a reliable way to decide when to drink water.   You may often feel the need for water as hunger instead of as thirst.

Water is a necessary part of the body’s fat utilization process.  Water assists the body in metabolizing stored fat because your liver, which metabolizes fat, becomes overloaded when your kidneys don’t get enough water. Your liver’s fat processing function is compromised when it has to do the kidneys’ job as well.  Water also helps suppress appetite and relieve fluid retention problems.

That is the reason why WATER is necessary/essential to life......but mind you water does not contribute an energy to the body. Because, to all six (6) essential nutrients, namely, carbohydrates,protein,fats,vitamins & minerals, and water, only the carbohydrates, protein, and fats contributes energy to the body.