Water, Water Everywhere

By: Carson McCall

Essential Functions:

1. Regulates body temperature: Because water has specific heat, this makes sure we do not over heat or freeze to death.

2. Helps remove body waste: Adequate water intake enables your body to excrete waste through perspiration, urination, and defecation.

3. Digestion: Digestion starts with saliva, the basis of which is water.

4. Water protect spinal cord, tissue, and joints: water helps protect the spinal cord, and it acts as a lubricant and cushion for your joints.

5. Moisture: Water keeps our eyes and mouth properly moisturized, so they can preform their functions properly.

6. Transportation: Nutrients and other essential elements need to be send all over the body and the way it reaches it's destination is through water.

7. Chemical: Chemical reactions such a protein that give us energy in our body are only able to do their jobs with water.

What % of human bodies are water?

Males: 60%

Women: 55%

This is due to the fact that women bodies are made up of more fat.

What type of people have the highest %?

Babies! They are 75% water, as they grow older they will "dry up" at a rate depending on what kind of life style choices they make.

What organs have the highest amount of water?

Top 5: Each of these organs need an increased amount of water in comparison to other functioning organs in the body because water plays a huge role in how they preform their functions.

1. Brain 80-85%

2. Kidneys 80-85

3. Heart 75-80%

4. Lungs 75-80&

5. Liver 70-75%

How much water SHOULD you take in?

  1. There are many different opinions on how much water we should be drinking every day. The health authorities commonly recommend eight 8-ounce glasses, which equals about 2 liters, or half a gallon. This is called the 8×8 rule so it is easy to remember!

Specific Heat, Why do we need it?

Water has the highest specific heat of any common substance. This provides stability of temperature for land masses surrounded by water, provides stability for the temperature of the human body, makes it an effective cooling agent, and many other benefits.

Survival of the Wettest

A human can go about 3 to 5 days without water.  During that time your stomach and lungs will start to have the hardest time doing their job, alongside your brain. Sunken eyes and dry mouth are starting symptoms that you need water.

Water V. Body Fat

In 1859, two scientists showed the inverse relationship between body water and fat content. They would later, in 1887, show that the variation in animal body water could be decreased when fat-free mass was used to express the data. These early scientists essentially introduced the concept fat-free mass and fat mass, through the use of body water content. They showed that body fat has relatively low water content and fat-free mass has relatively high water content.


With mild dehydration:

  • Lack of saliva
  • Decreased frequency of urine
  • Decreased output of urine
  • Deep color and strong odor in urine

Moderate dehydration:

  • Even less urine
  • Dry mouth
  • Dry and sunken eyes
  • Rapid heartbeat

Severe dehydration:

  • No urine
  • Lethargy and irritability
  • Vomiting and diarrhea


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