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Old 08-02-2006, 03:43 AM
Blake Blake is offline
Join Date: Mar 2001
Posts: 11,049
Originally Posted by I Love Me, Vol. I
Perhaps men and women of the same weight have different amounts of blood. So when you add the same amount of alcohol to each person, the BA levels are different.

And just to expand on what gabriela said, blood volume is determined almost entirely by how far nutrients and oxygen can diffuse. The body needs enough blood vessels to ensure that all cells are within that diffusion difference of a blood vessel, and all blood vessels need to be filled with blood within a narrow pressure range. As a result blood volume is going to be determined by body volume and not much else. Although women have a slightly lower density, and hence higher volume/mass, than men the difference isn't going make much difference to blood volume.

The total volume of water in the body is important in diluting alcohol and thus reducing BAL, but that water difference is due primarily to muscle volume, not blood.