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Vacuums and the Human Body
Vacuums and the Human Body
By Adam Sinicki
I am by nature a geek, and for this reason I enjoy writing about
science on the Biomatrix. I have subjected you to it before in the
form of my article on pharmacokinetics, but now it is time for
something a little different. Now it is time to understand...
vacuums! Joy!
Vacuums in the Human Body
To understand a vacuum is to understand pressure, and pressure and
vacuums are crucial to the operation of the human body. Your heart
for instance uses pressure in order to pump the blood around your
veins, while your lungs create a vacuum in order for you to suck in
air. And when you suck things up from the table or through a straw
you are creating a vacuum in your mouth – and you probably weren't
even aware you were doing it. I mean really, have you ever given any
thought to how 'sucking' actually works (stop sniggering). You just
do it, but what is actually going on here? To better understand the
human body and the world around us I feel that everyone should have a
good understanding of what a vacuum is.
What is a Vacuum?
So essentially a vacuum is a term used in science to describe a very
simple law. This law can basically be boiled down to the fact that
two areas of differing pressure will attempt to equalise and create
equal pressure. Pressure in this case is described by how tightly
compacted the atoms in something are – so if you take a tire and
pump it up with air, this will gradually increase in pressure as the
air particles more and more run out of space. This pressure is
measured as PSI which you can read on the guage.
Now when you let this area of high pressure come into contact with
an area of low pressure, the air particles will rush out of the high
pressure region and into the area of low pressure
in an
attempt to equalise. Normally they will be successful. And this will
always be the case – so if you create an area of
low
pressure in your mouth – which you can do automatically with your
mouth muscles – and then slightly open it, all the air will rush in
in order to fill that void. And that area of low pressure is what's
called a vacuum.
Examples of Vacuums
There are countless examples of vacuums and pressure in every day
life. As mentioned there are many in the human body – and when you
breath this works by your lungs creating a partial vacuum and
bringing air in that way. Likewise when you drink water through a
straw, this is again an example of your creating a vacuum in your
mouth and the water particles rushing up the straw in order to fill
that vacuum. Even when you swallow this is your
throat muscles
creating a vacuum to pull the food in. Isn't that kind of
extraordinary? (Sometimes I can be a bit of a pansy I apologise...).
On a larger and more impressive scale the best known vacuum (after
the Hoover – which coincidentally did you know what invented by the
President Hoover? The Hoover damn guy? (or that Isaac Newton
invented the cat flap??)) is space itself. When you're out in the
recesses of space there is no air and no particles and that means
it's a complete vacuum – and that's why their eyes get sucked out
of their head in Total Recall.
At the other end of the spectrum is the abyss – an area so deep in
the sea that the pressure of the sea is absolutely crushing. The
pressure of the sea is greater here than the
pressure in your
body and so it would crush you and rip you apart (nice) and the same
goes for man-made tools. When the hull of a plane is breached and
everything gets sucked out the side this is an example of a vacuum in
action too (take note of the vacuum action next time this happens) –
here the pressure in the air outside is so much lower than the high
pressure inside the plane that everything gets pulled out.
A Practical Demonstration
Gagging for one last demonstration of a vacuum? You're a bit weird
then... but go on – try sucking on your own arm. Notice that red
patch? That's your blood rushing to the surface in an attempt to fill
the vacuum in your mouth. Nice huh?
Copyright 2012 The Biomatrix.Net
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Vacuums and the Human BodyBy Adam SinickiI am by nature a geek, and for this reason I enjoy writing about science on the Biomatrix. I have subjected you to it before in the form of my article on pharmacokinetics, but now it is time for something a little different. Now it is time to understand... vacuums! Joy!
Vacuums in the Human Body
To understand a vacuum is to understand pressure, and pressure and vacuums are crucial to the operation of the human body. Your heart for instance uses pressure in order to pump the blood around your veins, while your lungs create a vacuum in order for you to suck in air. And when you suck things up from the table or through a straw you are creating a vacuum in your mouth – and you probably weren't even aware you were doing it. I mean really, have you ever given any thought to how 'sucking' actually works (stop sniggering). You just do it, but what is actually going on here? To better understand the human body and the world around us I feel that everyone should have a good understanding of what a vacuum is.
What is a Vacuum?
So essentially a vacuum is a term used in science to describe a very simple law. This law can basically be boiled down to the fact that two areas of differing pressure will attempt to equalise and create equal pressure. Pressure in this case is described by how tightly compacted the atoms in something are – so if you take a tire and pump it up with air, this will gradually increase in pressure as the air particles more and more run out of space. This pressure is measured as PSI which you can read on the guage. Now when you let this area of high pressure come into contact with an area of low pressure, the air particles will rush out of the high pressure region and into the area of low pressure in an attempt to equalise. Normally they will be successful. And this will always be the case – so if you create an area of low pressure in your mouth – which you can do automatically with your mouth muscles – and then slightly open it, all the air will rush in in order to fill that void. And that area of low pressure is what's called a vacuum.
Examples of Vacuums
There are countless examples of vacuums and pressure in every day life. As mentioned there are many in the human body – and when you breath this works by your lungs creating a partial vacuum and bringing air in that way. Likewise when you drink water through a straw, this is again an example of your creating a vacuum in your mouth and the water particles rushing up the straw in order to fill that vacuum. Even when you swallow this is your throat muscles creating a vacuum to pull the food in. Isn't that kind of extraordinary? (Sometimes I can be a bit of a pansy I apologise...). On a larger and more impressive scale the best known vacuum (after the Hoover – which coincidentally did you know what invented by the President Hoover? The Hoover damn guy? (or that Isaac Newton invented the cat flap??)) is space itself. When you're out in the recesses of space there is no air and no particles and that means it's a complete vacuum – and that's why their eyes get sucked out of their head in Total Recall. At the other end of the spectrum is the abyss – an area so deep in the sea that the pressure of the sea is absolutely crushing. The pressure of the sea is greater here than the pressure in your body and so it would crush you and rip you apart (nice) and the same goes for man-made tools. When the hull of a plane is breached and everything gets sucked out the side this is an example of a vacuum in action too (take note of the vacuum action next time this happens) – here the pressure in the air outside is so much lower than the high pressure inside the plane that everything gets pulled out.
A Practical Demonstration
Gagging for one last demonstration of a vacuum? You're a bit weird then... but go on – try sucking on your own arm. Notice that red patch? That's your blood rushing to the surface in an attempt to fill the vacuum in your mouth. Nice huh?
Copyright 2012 The Biomatrix.Net
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