When the doctor/nurse takes blood from you, why do they try to find a vein, not an artery? And also why is this mainly done on the arm as opposed to other parts of the body?
In: Biology
Venous blood goes to the heart , through the lung and then arteries. If you went into an artery, it would only go to the tissues that artery leads to which would be that effective. Also, arteries suck to stop bleeding. Veins are much easier to stop the bleeding. Also, you can blow a vein when trying for an iv and it’s not that bad. Blow an artery and you got a problem on your hands. Also your arm has lots of relatively straight veins which are easy to bang an iv into and is easy to tourniquet to get the veins to pop out. There are times when an iv is done in other spots than the arm.
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