Corresponding Author:
Gareth Morgan, garethmorgan@live.com
Citation:
Morgan, G. (2021). A Day at the Beach.
Academia Letters
, Article 1254.
https://doi.org/10.20935/AL1254
.
4
©2021 by the author — Open Access — Distributed under CC BY 4.0
Since the urine was virtually colourless I was confident that I was no longer dehydrated
and that I must indeed have absorbed all that water through my skin – quite a major finding,
new to science – but how salty was it?
If it was excessively salty then my kidneys must have been very busy filtering the salt out
of my bloodstream. If it was less salty than normal, then my sweat glands must have been
equally busy filtering out the salt before I absorbed it. Kidneys or eccrine glands? Dialysis or
reverse osmosis? Salt or fresh? Red or blue?
Back to the hydrometer. 1.006! Way down from the 1.030 of the first sample and far less
than seawater at 1.027.
I was peeing virtually fresh spring water. Result! Extraordinary evidence generated by a
cheap, quick, easily repeatable experiment.
A couple of academic journals expressed interest – provided the study was repeated nu-
merous times using many different subjects. You need a licence to experiment on people
though, so that would have to wait a while.
One of the editors also couldn’t understand how the water could find its way from my
sweat glands to my kidneys, but I had looked into this.
The sweat glands are connected by a duct to the interstitium, which is “a contiguous fluid-
filled space existing between a structural barrier, such as a cell wall or the skin, and internal
structures, such as organs, including muscles and the circulatory system. The fluid in this
space is called interstitial fluid, (which) comprises water and solutes, and drains into the lymph
system.”
The lymphatic system in turn drains into the bloodstream just above the heart and from
there, eventually to the kidneys.
Anyway, I had what I wanted. I now knew how our earliest ancestors could have survived
the Miocene drought on the barren East African coast when so many other primate species
had become extinct through hunger and thirst.
Academia Letters, June 2021
Corresponding Author:
Gareth Morgan, garethmorgan@live.com
Citation:
Morgan, G. (2021). A Day at the Beach.
Academia Letters
, Article 1254.
https://doi.org/10.20935/AL1254
.
5
©2021 by the author — Open Access — Distributed under CC BY 4.0
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