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Excretory System - tia
Transcript of Excretory System - tia
ribs. The main functions of the kidney are:
Regulating the amount of water and salts in the blood
Filtering out waste products
Making a hormone that helps to control blood pressure.
Each of the kidney has a tube called a ureter. The filtered waste/urine leaves the kidneys by the ureters and enter the bladder.
The bladder is a hollow organ is inside the pelvis. When a certain amount of urine is inside the bladder, the bladder signals the urge to urinate. Urine contains water and waste products like urea and ammonia.
The urethra is the small tube connecting the bladder to the outside of
the body. The male urethra is about 20cm long, while the female
urethra is shorter by about 4cm The excretory system is made up of kidneys, bladder, ureters and the urethra.
Blood from the heart travels down
the aorta where it enters the kidney
from the renal arteries. Flow Chart The kidney acts as a filter and
waste products (urea) and
balancing glucose, electrolytes
(salt, potassium and other minerals)
and water levels in the blood. Urine from the kidney flows through
the ureter to the bladder, where is leaves
the body from the urethra.