Role of Kidney in Homeostasis
The Excretory System
The excretory system removes urea, a waste product of metabolism, and
regulates the water content of the blood.
Cleaning the Blood
• Blood from the aorta moves into the renal artery and into the kidney.
• The kidney filters the blood and removes some water, urea, and excess
salts.
• Cleaned blood returns to the heart in the vena cava.
• The filtrate called urine leaves the kidneys in the ureters and is stored in
the bladder.
• Urine is passed out of the body through the urethra.
Detecting Disease
• Red blood cells in urine indicate kidney damage or disease.
• Glucose in the urine can indicate diabetes.
Kidney Failure Treatments
Treatment Advantages Disadvantages
Dialysis Immediately available. Requires long hospital
visits and dietary
The Excretory System
The excretory system removes urea, a waste product of metabolism, and
regulates the water content of the blood.
Cleaning the Blood
• Blood from the aorta moves into the renal artery and into the kidney.
• The kidney filters the blood and removes some water, urea, and excess
salts.
• Cleaned blood returns to the heart in the vena cava.
• The filtrate called urine leaves the kidneys in the ureters and is stored in
the bladder.
• Urine is passed out of the body through the urethra.
Detecting Disease
• Red blood cells in urine indicate kidney damage or disease.
• Glucose in the urine can indicate diabetes.
Kidney Failure Treatments
Treatment Advantages Disadvantages
Dialysis Immediately available. Requires long hospital
visits and dietary
