The title says it all really. I have discovered that the time for blood to complete the entire vascular circuit is about a minute. The time for an injection into an arm vein to reach the brain is about 30 seconds. If memory serves, for an injection into a vein to reach the brain, it has to travel to the heart, pass through the lungs, back to the heart, and out the aorta before it can reach the brain, quite a round trip for 30 seconds! So, how long does it take blood to just travel from the lungs to the brain?
(I’m curious to know what’s the minimum time it should have taken for Anya Amasova’s knockout cigarette to have dropped James Bond in The Spy who loved Me.)