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Author Topic: How long are the body's blood vessels, connected end to end?  (Read 16177 times)

Offline chris

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If all of the blood vessels in a human were strung out end to end, what distance would they span?

Chris


 

Offline Geezer

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How long are the body's blood vessels, connected end to end?
« Reply #1 on: 30/12/2009 17:07:08 »
Und vie vould you like to know zis, Herr Doktor Frankenstein?
« Last Edit: 30/12/2009 19:50:36 by Geezer »
 

Offline Variola

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How long are the body's blood vessels, connected end to end?
« Reply #2 on: 30/12/2009 18:36:45 »
Und vie vould you like to know zis, Herr Doctor Frankenstein?

His had mislaid his medical textbook from undergrad days?? :-)

Answer is about 60,000 miles I think,although the number varies from book to book.
 

Offline Geezer

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How long are the body's blood vessels, connected end to end?
« Reply #3 on: 30/12/2009 18:46:19 »

Answer is about 60,000 miles I think,although the number varies from book to book.
 

Blimey! That's enough to circumcise the globe more than two times.
 

Offline Variola

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How long are the body's blood vessels, connected end to end?
« Reply #4 on: 30/12/2009 19:15:44 »

Answer is about 60,000 miles I think,although the number varies from book to book.
 
Yup.

These questions Chris asks always seems to end up with me answering them.... quite boring for others I should imagine.
Mind you they are useful for revision....if he could structure them round infection and disease for this term I'd be grateful... lol


Blimey! That's enough to circumcise the globe more than two times.

Yup.

These questions Chris asks always seems to end up with me answering them.... quite boring for others I should imagine.
Mind you they are useful for revision....if he could structure them round infection and disease for this term I'd be grateful... lol
 

Offline RD

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How long are the body's blood vessels, connected end to end?
« Reply #5 on: 31/12/2009 00:26:48 »
It  should be possible to calculate an upper limit for this figure...

Imagine the entire blood volume was all contained in the smallest type of blood vessel (capillary),
 how long would that vessel have to be ?

Volume of blood in adult human  http://en.wikipedia.org/wiki/Blood_volume  4.7 -5 litres

Diameter of capillary  http://en.wikipedia.org/wiki/Capillary  5-10 μm

We're going for the upper limit so lets use 5μm and 5litres.

Volume of a cylinder
: v = π r2 h where r=2.5μm v=5litres

=> h (or rather length) = 255 million Km. The answer has to be smaller.
« Last Edit: 31/12/2009 00:34:06 by RD »
 

Offline Chemistry4me

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How long are the body's blood vessels, connected end to end?
« Reply #6 on: 31/12/2009 01:14:40 »
Nice, I had no idea it was that long.
 

Offline chris

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How long are the body's blood vessels, connected end to end?
« Reply #7 on: 31/12/2009 01:29:21 »
That's what my girlfriend said...
 

Offline Chemistry4me

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How long are the body's blood vessels, connected end to end?
« Reply #8 on: 31/12/2009 01:35:01 »



Hmmm...
 

Offline Variola

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How long are the body's blood vessels, connected end to end?
« Reply #9 on: 31/12/2009 09:16:37 »
It  should be possible to calculate an upper limit for this figure...

Imagine the entire blood volume was all contained in the smallest type of blood vessel (capillary),
 how long would that vessel have to be ?

Volume of blood in adult human  http://en.wikipedia.org/wiki/Blood_volume  4.7 -5 litres

Diameter of capillary  http://en.wikipedia.org/wiki/Capillary  5-10 μm

We're going for the upper limit so lets use 5μm and 5litres.

Volume of a cylinder
: v = π r2 h where r=2.5μm v=5litres

=> h (or rather length) = 255 million Km. The answer has to be smaller.

RD...you have way too much time on your hands..... :D
 

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How long are the body's blood vessels, connected end to end?
« Reply #9 on: 31/12/2009 09:16:37 »

 

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