This schematic illustrates the organization of blood vessels and the regulation of blood flow (arrows) in the palm of the hands. Arteriole-venule shunts are small muscular valves that connect directly ...
N.B. Please note that if you are outside North America the embargo for Lancet press material is 0001 hours UK time Friday 5th October 2001. Retinal photography—used to detect abnormalities in blood ...
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