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Content of Human Blood?

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Content of Human Blood?

Postby montana » Mon Aug 01, 2005 5:33 pm

I am a fiction writer who tends to use a lot of science in my work. I have read that seawater and human blood are made up of similar amounts of "salts" particularly chloride and sodium. While I have found various results for the content of seawater (anywhere from 75-85% of its salt content) I cannot seem to locate any tables that offer a similar breakdown of human blood. Does anyone have access to such information or can you offer suggestions as to where I can find it? Thanks in advance.
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Postby sdekivit » Mon Aug 01, 2005 6:05 pm

according to my physiologybook:

'water is the main component of plasma, accounting for almost 92% of its weight. Proteins account for another 7 %. The remaining 1% is dissolved organic molecules, ions ( for salts), trace elements and vitamins, and dissolved oxygen and carbon dioxide.'

The normal hematocrit of the blood is about 45%, so 55% of the blood is plasma.
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Postby montana » Mon Aug 01, 2005 6:48 pm

Does it say which percent of the salts are chloride or sodium (as opposed to magnesium, etc.)?
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Postby sdekivit » Mon Aug 01, 2005 6:58 pm

nope sorry. Mayb you should check on google.
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Postby Dr.Stein » Tue Aug 02, 2005 1:31 am

You can make a saline solution that equals to the concentration of normal body fluid* (isotonic) by yourselves. It is called "physiological salt" that contains 0.9% NaCl dissolved in distilled water. You can easily find NaCl powder and distilled water in chemical stores ;)

I often use this solution in my lab to wash and even soak tissues and organs prior to be processed for any preparation. This will preserve them for a little while from any damaged or being autolysis.

*body fluid includes: extracellular fluid (blood, lymph) and interstitial/tissue fluid.

Good luck! And don't forget to tell me about your book after you finish it :)
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Postby mith » Tue Aug 02, 2005 4:02 am

Can you buy NaCl from grocery stores? :D
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Postby Dr.Stein » Tue Aug 02, 2005 5:20 am

Yes of course, just choose your fav one with the funny brand name and pretty package :D It is more 'valuable' than the one in chemical stores becauce it contains iod and you can use it not only in your lab but in your kitchen. Buy now as a gift for you mom :lol:
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Postby Jokkon » Tue Aug 02, 2005 5:26 am

does the iodine bond with the NaCl? oh, it wouldn't be NaCl if it bonds with the iodine, would it not? they just put it there so u don't get a huge bulge thingy on ur neck right?
I am just a high school student
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Postby Dr.Stein » Tue Aug 02, 2005 5:44 am

Yes, iod helps us to avoid goiter by synthesize adequate thyroxin. But in this case, we need pure NaCl to make the physiological saline :wink:
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Postby mith » Tue Aug 02, 2005 3:07 pm

There are non-iodized salt in the grocery stores but they also contain anti-caking ingredients so I guess it isn't pure.
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