Excretory System Flashcards
What are the parts of the kidneys?
The cortex, medulla, pelvis
what are the organs found in the excretory system?
kidneys, ureters, bladder, urethra
What does the kidney do?
It filters the body’s blood and controls the levels of water and salt in the body. It excretes urea
What makes up the majority of urine and what are the percentages?
Water is the main substance in an average persons urine. It makes up 95% of the urine and the other 5% is urea
How does the excretory system work?
The kidney filters the blood and extracts excess amounts of water and salt. These waste products then travel through the ureters into the bladder where it is stored until the bladder has held up to 300ml. This will trigger the urge to urinate and the urine will pass from the body through the urethra.
What causes kidney stones to form?
They are caused by dehydration which can result in crystals forming. If the crystals are small they can travel out of the body however larger crystal require surgery for them to be removed.
