Body fluid compartments

Dr. Morton explains the distribution of water in the human body, highlighting that 60% of body mass is water. This water is divided into intracellular fluid (2/3) and extracellular fluid (1/3). The extracellular fluid is further divided into plasma (1/4) and interstitial fluid (3/4). The video also covers the role of cell membranes and capillary walls in separating these fluids. An example calculation is provided to illustrate how to determine the amount of fluid in each compartment for a 100 kg patient.

What percentage of the human body is made up of water?

• 40%

• 50%

• 60%

• 70%

How is the body's water content divided between intracellular and extracellular fluid?

• 1/3 intracellular, 2/3 extracellular

• All intracellular

• 1/2 intracellular, 1/2 extracellular

• 2/3 intracellular, 1/3 extracellular

What fraction of the extracellular fluid is plasma?

• 1/2

• 3/4

• 1/3

• 1/4

In a 100 kg person, how many liters of water are found in the intracellular fluid?

• 20 liters

• 30 liters

• 40 liters

• 50 liters

How many liters of interstitial fluid are present in a 100 kg person?

• 20 liters

• 5 liters

• 10 liters

• 15 liters