A blood alcohol concentration (BAC) or blood alcohol level (BAL) reflects the amount of alcohol in the body. Food, type and quantity of beverage, weight, sex, and rate of elimination determine the BAC after the consumption of alcohol.
The process of oxygen transfer in the gills of a fish is a good example of the benefits of countercurrent exchange. As oxygen poor blood meets an opposed flow of oxygen rich water, the oxygen begins to diffuse out of the water and into the blood stream.
made up of laminae or layers; pertaining to a lamina. laminar flow hood a device that separates the air flowing through it into layers, cleansing the air of microorganisms. It is used to protect patients with compromised immune systems and is also used in operating rooms and pharmacies to provide a clean environment.