extracellular fluid
Học thuậtThân thiện
Definition
Noun The fluid found outside the body's cells. It is the liquid component of the internal environment that bathes and surrounds cells, providing a medium for transporting nutrients, waste products, and chemical messengers.
Usage
"Extracellular fluid" is a scientific and medical term. It is typically used as a non-count noun to describe the collective fluid in spaces outside cells. It is often discussed in contexts of physiology, biology, and medicine.
Examples
- The composition of extracellular fluid is carefully regulated by the kidneys and other organs.
- Dehydration leads to a significant loss of extracellular fluid.
- Nutrients must pass from the blood, through the extracellular fluid, to reach the cells.
Advanced Usage
- Compartmentalization: In physiology, the total body water is divided into major compartments, with extracellular fluid being one of the two primary ones (the other is intracellular fluid).
- Clinical Context: The term is frequently used when discussing fluid balance disorders, edema (swelling caused by excess fluid in tissues), and intravenous therapy.
Variants and Related Words
- ECF: A common initialism for "extracellular fluid."
- Interstitial Fluid: A major sub-component of extracellular fluid; it is the fluid that occupies the spaces between tissue cells.
- Blood Plasma: The liquid, non-cellular part of blood, which is another major sub-component of extracellular fluid.
- Intracellular Fluid (ICF): The fluid contained within cells, contrasting with extracellular fluid.
Synonyms
- Internal Environment (in a physiological context, though this is a broader concept)
- Tissue Fluid (a less precise, more general term often referring to interstitial fluid specifically)
Different Meanings
The term "extracellular fluid" has a single, specific meaning in biology and medicine. It does not have common idiomatic or figurative uses.
Noun
- liquid containing proteins and electrolytes including the liquid in blood plasma and interstitial fluid
- the body normally has about 15 quarts of extracellular fluid