Kidneys & Urine < Urinary System < Anatomy
Structure of the Urinary System
Function of the Kidneys
- 1 - Filtration: When the blood enters the kidneys, it gets filtered. The filtrate contains good and bad stuff.
- 2 - Reabsorption: The body takes the good stuff back into the blood supply because the body needs it (ions, water, etc).
- 3 - Secretion: Removal of substances from in the body into the filtrate (i.e. H+ ions)
- 4 - Elimination: Removal of urine from the body (ultimately via the urethra).
GFR
The glomerulus within each nephron filters the blood of toxins and waste products.
Collectively, the glomeruli filter about 180 liters of plasma per day.
The GFR is a rough indication of the volume of blood (mL)
filtered per minute (min) per body surface area (1.73 m2)
in all the functioning nephrons.
The normal value for GFR depends on age, sex, and body size
and is approximately 120 (in women) and 130 (in men) mL/min/1.73m2.
https://www.interactive-biology.com/8305/the-human-kidney-anatomy-and-physiology/
https://www.nursingcenter.com/ncblog/march-2022/glomerular-filtration-rate
Ch 4 - Body and Beauty
Heal, 2022oct19, 2023feb14, anatomy, urinary system, kidneys, bladder