Parts
Functions
Diseases & Disorders
Weird facts
Water & Waste balance
100

This organ filters blood to produce urine.

What is the kidney?

100

This is the primary function of the urinary system.

What is removing waste from the blood (or excreting urine)?

100

This painful condition occurs when minerals crystallize in the kidneys.

What are kidney stones?

100

The average person produces this much urine per day.

What is 1–2 liters?

100

This common waste product is formed in the liver and excreted by the kidneys.

What is urea?

200

These two thin tubes transport urine from the kidneys to the bladder.

What are the ureters?

200

The kidneys help regulate this, keeping it from being too high or low.

What is blood pressure?

200

This condition happens when the body can't filter blood properly and waste builds up.

What is kidney failure?

200

The color of your urine can indicate this.

What is your hydration level (or health status)?

200

The kidneys help regulate this mineral, which is essential for muscle and nerve function.

What is sodium (or potassium)?

300

This muscular sac stores urine until it's ready to be excreted.

What is the bladder?

300

This hormone, produced by the kidneys, stimulates red blood cell production.

What is erythropoietin?

300

A urinary tract infection (UTI) usually affects this organ first.

What is the bladder?

300

This is the reason asparagus can make your urine smell funny.

What is the breakdown of sulfur-containing compounds in asparagus?

300

This hormone signals the kidneys to retain water when the body is dehydrated.

What is antidiuretic hormone (ADH)?

400

This tube carries urine from the bladder out of the body.

What is the urethra?

400

This process happens in the glomerulus and filters blood.

What is filtration?

400

This is the presence of blood in urine.

What is hematuria?

400

Urine was once used in ancient Rome for this strange purpose.

What is teeth whitening or laundry detergent?

400

Too little water in the body can lead to this concentrated condition of the urine.

What is dehydration?

500

The basic structural and functional unit of the kidney.

What is the nephron?

500

The reabsorption of water occurs mainly in this part of the nephron.

What is the loop of Henle (or proximal tubule)?

500

This condition occurs when urine backs up into the kidney, causing it to swell.

What is hydronephrosis?

500

The kidneys filter about this many liters of blood each day.

What is 180 liters or about 47 gallons?

500

This process in the nephron allows essential substances like glucose and amino acids to return to the blood.

What is reabsorption?

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