What does nephron mean?
A nephron is the microscopic functional unit of a kidney. Millions of nephrons in each kidney filter blood through structures called glomeruli, then modify the resulting filtrate through a system of tubules. During this process, the nephron helps remove wastes, reclaim useful substances such as water and ions, and help regulate the body's fluid and electrolyte balance. Its work also depends on surrounding blood vessels, tubules, and loop of Henle, with each component contributing to the formation and concentration of urine. The term is especially important in medicine and physiology because many forms of kidney disease involve damage to nephrons or their filtering and tubular structures. For a general reader, the nephron illustrates how an organ can achieve complex regulation through the coordinated action of vast numbers of repeated microscopic units.
nounA nephron is one of the kidney's microscopic functional units. Each nephron filters blood, adjusts the composition of the filtrate, and helps produce urine.
- An anatomical and physiological sense: a microscopic functional unit of a kidney that filters blood and contributes to urine production.
"Each kidney contains millions of nephrons working together to filter blood and regulate the body's fluid and electrolyte balance."
"Blood flows through the filtering structures of each nephron before the modified filtrate continues toward the renal pelvis."
"Damage to the nephrons can impair the kidney's ability to remove wastes and maintain fluid balance."
The standard plural adds -s; in medical prose, both singular and plural forms are frequently used.
"Kidney function can decline when the nephrons are damaged by disease or prolonged inflammation."
Your kidneys may look like a pair of beans, but their microscopic nephrons perform some of the body's most exacting chemical work.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does nephron come from?
The word comes through New Latin from Greek nephros, meaning “kidney.” The scientific terminology surrounding kidneys was developed in the 19th century, and the term was adopted to name the organ's microscopic functional units. Many related medical words—including nephrology, nephritis, and nephropathy—continue to use the same Greek root for “kidney.”
Related word forms
How nephron is actually used
Nephron is primarily used in medicine, physiology, and anatomy. In general discussion, a kidney or renal unit may sound more accessible. The term is commonly found in both singular and plural constructions, especially when discussing kidney damage or function.
Easily confused with nephron
A nephron is a kidney structure, whereas nephritic is an adjective relating to inflammation of the kidney.
A nephron is an individual functional unit of the kidney, whereas nephrotic describes a condition involving damage to the kidney's filtering structures.