WATER

[vindog]

Havin a Debate.How much of a muscle is composed of Water??

[mrbeefy]

This is what I found on the "net":

As much as 70% of your body is comprised of water - including 83% of your blood, 22% of your bone, and a whopping 75% of your muscle tissue.

[mrbeefy]

A little more:

In medicine, body water is all of the water content of the human body. A significant fraction of the human body is water. Lean muscle tissue contains about 75% water by weight. Blood contains 95% water, body fat contains 14% water and bone has 22% water. Skin also contains much water. The human body is about 60% water in adult males and 55% in adult females.

In diseased states where body water is affected, the compartment or compartments that have changed can give clues to the nature of the problem. Body water is regulated by hormones, including anti-diuretic hormone (ADH), aldosterone and atrial natriuretic peptide.

There are many methods to determine body water. One way to get a simple estimate is by calculation.

Contents
1 Calculation of body water
2 Measurement of body water
2.1 Dilution and equilibration
2.2 Bioelectrical impedance analysis
3 Fluid loss
4 References
5 External links


Calculation of body water
In individuals of normal weight, water is abundant in most parts of the body, except in adipose tissue (fat). These calculations are for adults of average build, and are inappropriate for obese or overly muscular people. These proportions are very simplified and use round numbers for quick calculation.

The largest component of the body is water. Water makes up between 45 and 75% of body weight, with the variability due primarily to differences in body fat. While most tissues including muscle, skin, and visceral organs are over 70% water, adipose tissue contains less than 10% water. The percentage of body weight that is water therefore varies inversely with body fat. In the average lean adult male around 60% of the body weight is water. The remaining body weight consists of 16-18% fat with 22-24% protein, carbohydrate and other solids. In the female the percentage of body weight that is water is lower due to a relatively greater amount of subcutaneous fat.[1]

Body water is broken down into the following compartments:[2]

Intracellular fluid (2/3 of body water)
Extracellular fluid (1/3 of body water)
Plasma (1/5 of extracellular fluid)
Interstitial fluid (4/5 of extracellular fluid)
Transcellular fluid (a.k.a. "third space," normally ignored in calculations)
Contained inside organs, such as the gastrointestinal, cerebrospinal, peritoneal, and ocular fluids.
The simplest calculation is the 60-40-20 rule.

Total Body Water = 60% of body weight
Intracellular fluid = 40% of body weight
Extracellular fluid = 20% of body weight
This is consistent with the above relations between total body water and the compartmental fluids.

These proportions are not preserved in fluid interventions, however. For example, pure water added to total body water will distribute throughout the above compartments, but isotonic saline will remain in the extracellular compartment.

[vindog]

THANKS FRANK!!! #smileygreatpost0av#