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Author Topic: What is the main factor that makes the circulatory system so important?  (Read 4740 times)

Offline The Scientist

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We know that the circulatory system aids us in the transport of blood around the body, but is there any other main function/ purpose of the circulatory system in humans? Thanks!


 

Offline tommya300

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We know that the circulatory system aids us in the transport of blood around the body, but is there any other main function/ purpose of the circulatory system in humans? Thanks!

As the blood pumps, this pressure can be a signal that there is still some life force in existance. It is rare that the vital signs can be so faint that the body may be presumed dead. Sort of a zombie label.    
 

Offline iko

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We know that the circulatory system aids us in the transport of blood around the body, but is there any other main function/ purpose of the circulatory system in humans? Thanks!

As the blood pumps, this pressure can be a signal that there is still some life force in existance. It is rare that the vital signs can be so faint that the body may be presumed dead. Sort of a zombie label.    

Yes, pressure pumped to allow circulation...but blood is RED because of IRON bound to each of the 4 proteins(globins) that form 1 hemoglobin molecule: about 350x10E6 molecules of hemoglobin are packed in a red cell and carry OXYGEN to different organs and tissues.
Oxygen is vital for living cells and energy production, so this may be considered the most important function of any circulatory system in animals.





...and circulation-oxygen-transport has to go on constantly to keep you alive, even during cardiac surgical repair or transplant:


I saw an operation being done on tv- and have seen this before - when someone is having a heart operation  and the blood is drained out of the body,the heart is stopped, the body temp is very much lowered and the brain waves are completely flat. How is this person still alive? how is he comparable with a person deemed dead? How would the surgeon know if the patient died? how can the body be made normal again after being frozen, drained of blood and brain dead?
And if , as one reply said, the cells are still alive at some level, if all the major signs of death occurring are there in a regular corpse, how can anyone know whether that corpse has some cells left alive and could be revived like the body on the operating table? how many people are actually buried alive? i.e. potentially revivable?

The blood is actually drained out of the heart only: big arteries and veins are quickly connected to a heart-lung machine, a mechanical pump with a special device to oxygenate blood.  An artificial extracorporeal circulation is estabilished, to bring oxygen to brain, kidneys and liver plus all the other organs.  In the meantime the heart can be repaired...or transplanted.

« Last Edit: 11/07/2010 10:54:03 by iko »
 

Offline Pwee

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Blood vessels are invaluable for the immune system too.
 

Offline imatfaal

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Many of the homeostatic mechanisms within the body work through blood-born factors - these need to be swished around to have anything other than a local effect.
 

Offline Pwee

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It helps with heat distribution, and communication too inside the body. Long distance chemical communication works through the blood stream too.
 

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