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Nephrons

A tiny part of the kidneys. Each kidney is made up of about 1 million nephrons, which are the working units of the kidneys, removing wastes and extra fluids from the blood.

PubMed Health Glossary
(Source: NIH - National Institute of Diabetes and Digestive and Kidney Diseases)

Drawing of a kidney with an inset of a nephron. Click to enlarge

Kidney showing a filtering unit called the nephron (one of about a million) National Institutes of Health

Terms to know

Bladder
The organ that stores urine.
Glomeruli
A tiny set of looping blood vessels in the nephron where blood is filtered in the kidney. Plural of glomerulus.
Kidney
One of a pair of organs in the abdomen. The kidneys remove waste and extra water from the blood (as urine) and help keep chemicals (such as sodium, potassium, and calcium) balanced in the body. The kidneys also make hormones that help control blood pressure and stimulate bone marrow to make red blood cells.
Renal Tubules
The last part of a long, twisting tube that collects urine from the nephrons (cellular structures in the kidney that filter blood and form urine) and moves it into the renal pelvis and ureters. Also called collecting duct.
Urine
Liquid waste product filtered from the blood by the kidneys, stored in the bladder, and expelled from the body by the act of urinating.

Terms to know

Bladder
The organ that stores urine....
Glomeruli
A tiny set of looping blood vessels in the nephron where blood is filtered in the kidney. Plural of glomerulu...
Kidney
One of a pair of organs in the abdomen. The kidneys remove waste and extra water from the blood (as urine) an...
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