Body Fluid Compartments

by Thad Wilson, PhD

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    It’s now time to wrap up the renal system. We’re going to do that by looking at body fluid compartments. And some of the alterations that happen clinically within those body fluid compartments. But what really is the body? The body is really nothing more than a bag of water. So it's going to be represented here by a water balloon. So let’s just put some arms and legs on our person here. We are about 60% water, and that can vary a little bit between person and dependent upon someone’s body composition. But let’s just look at a person’s average body water. You have about 14 liters of water, and what we’re going to call the extracellular fluid compartment. That is made up from about 3 liters of plasma volume, and about 11 liters of volume in the interstitial fluid. The extracellular fluid, however, only encompasses about 1/3 of total body water. The other component is what is located within cells, which is known as the intercellular fluid compartment. You have normal body water intake, which is what you drink and what you eat during individual day. And then, of course, you have to subtract out the body water that you lose. So this example is a nice way to think about body fluid compartments and we’re going to utilize this particular 14 liters of extracellular fluid, 28 liters of intercellular fluid as kind of the typical maybe the 70-kg adult male. So in terms of the intakes, how can we break that in? So let’s look at fluid ingestion. You might ingest in a normal day about 2.1 liters. You have a little bit of water that is made from metabolism. So this is the breakdown of glycogen. There’s going to be some release of water. So...

    About the Lecture

    The lecture Body Fluid Compartments by Thad Wilson, PhD is from the course Renal Physiology.

    Included Quiz Questions

    1. Intracellular fluid volume
    2. Interstitial fluid volume
    3. Cell membrane fluid volume
    4. Plasma volume
    1. Potassium
    2. Sodium
    3. Calcium
    4. Magnesium
    5. Chloride
    1. Sweat
    2. Feces
    3. Urine
    4. Lungs
    5. Skin
    1. Plasma
    2. Intracellular fluid
    3. Interstitial Fluid
    4. Cell membrane
    5. Extracellular Fluid

    Author of lecture Body Fluid Compartments

     Thad Wilson, PhD

    Thad Wilson, PhD

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