Talk:Double circulatory system
I don't understand this sentence:
"The average heart pumps about 5,040 ml of blood per minute and an average adult has about 5 liters of total blood volume, so the heart is exchanging blood volume at a rate of about ten times per second."
--Jesse
Me either. From what it said it would seem more accurate to say "The human heart pumps the equivalent of the complete blood content of the human body in one minute"? Or am I misreading it? Either way I think it needs more explanation to avoid confusion.
TristanJ 16:48, 16 September 2007 (UTC)
The article says "vary by a factor of ten, from 1.2 m/s in the aorta to approximately 1.1 cm/s in the capillaries" - but that's a factor of 100, not ten!
Mperrin 18:37, 23 June 2007 (UTC)
Shouldn't that be reversed? The aorta has a wider cross section and thus the fluid will pump slower under the same pressure than the capillaries, which are narrower and more constricted?