Collecting duct
Collecting Duct
The Collecting Duct (kəˈlɛktɪŋ dʌkt) is a component of the nephron, the functional unit of the kidney. It plays a crucial role in the regulation of bodily fluids and electrolyte balance.
Etymology
The term "Collecting Duct" is derived from its function of collecting filtrate from the nephron and directing it towards the renal pelvis. The word "duct" comes from the Latin ductus meaning "a leading", while "collecting" is derived from the Latin collectus, the past participle of colligere meaning "to gather".
Function
The primary function of the Collecting Duct is to reabsorb water and certain solutes from the filtrate, under the influence of Antidiuretic Hormone (ADH). This process helps in maintaining the body's water and electrolyte balance.
Structure
The Collecting Duct is composed of two cell types: principal cells and intercalated cells. Principal cells are responsible for the reabsorption of water and sodium ions and the secretion of potassium ions. Intercalated cells, on the other hand, help in the regulation of blood pH by reabsorbing bicarbonate ions and secreting hydrogen ions.
Related Terms
- Nephron: The functional unit of the kidney, consisting of a renal corpuscle, proximal convoluted tubule, loop of Henle, distal convoluted tubule, and the Collecting Duct.
- Antidiuretic hormone: A hormone that regulates water reabsorption in the Collecting Duct.
- Renal pelvis: The funnel-shaped structure that collects urine from the Collecting Ducts and directs it towards the ureter.
External links
- Medical encyclopedia article on Collecting duct
- Wikipedia's article - Collecting duct
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