Summary
Body water is divided into intracellular and extracellular fluid, with distinct ion compositions.
In depth
Total body water is about 60 percent of weight: two-thirds intracellular, one-third extracellular (plasma and interstitial). Intracellular fluid is rich in K+, extracellular in Na+ and Cl-. Oncotic pressure from albumin retains plasma.
Water moves between compartments by osmosis and hydrostatic pressure. Starling forces govern capillary exchange.
Remember: oedema is excess interstitial fluid.
Frequently asked questions
What is Fluid Compartments?
Body water is divided into intracellular and extracellular fluid, with distinct ion compositions.
Which area of biology covers Fluid Compartments, and how advanced is it?
Fluid Compartments is one of the 51 topics in Human Physiology. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Nephron Function, Blood Vessels, Gas Exchange in Alveoli.
Can you give an example of Fluid Compartments?
Low albumin causes oedema.
What should I learn before Fluid Compartments?
Work through the Beginner topics in Human Physiology first, such as Homeostasis, Tissues and Organs, Skeletal System, then return to Fluid Compartments. Advanced topics assume the Intermediate vocabulary.
What topics are related to Fluid Compartments?
The closest topics to Fluid Compartments are Nephron Function, Blood Vessels, Gas Exchange in Alveoli, Blood Components. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Fluid Compartments?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Fluid Compartments. To practise the whole of Human Physiology, use the Human Physiology quiz.
How is Fluid Compartments different from Nephron Function?
Fluid Compartments: Body water is divided into intracellular and extracellular fluid, with distinct ion compositions. Nephron Function: Filtration, selective reabsorption and secretion in the nephron form urine. Read both side by side and note what each one explains.
How should I study Fluid Compartments step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Nephron Function and explain the difference aloud. Finally, take the Human Physiology quiz and come back to this page for any question you miss.