This organ in the excretory system stores urine until the body is ready to eliminate it.

There are approximately one million of these tiny filters in each kidney.

The number of kidneys in a human.

Skin is not part of the excretory system?
True or False?

In which excretory organ is urea produced?

The chemical eliminated through the excretory system which comes from the breakdown of protein.

The kidney has two principal/main layers.

Nephrons are urine-forming structures of the kidneys?
True or False?

This excretory organ eliminates water and some chemicals in perspiration.

_______ useful chemicals and water are removed from blood in the first stage of urine formation.

What are the four organs that contribute to homeostasis in the excretory system?

Water forms 95% of the urine.
True or False?

Urine passes out of the body through this tube.

The watery fluid which contains urea, excess water, and other waste materials.

What is excreted through these three organs: kidneys, lungs and skin?

You can survive with one kidney.
True or False?

Tiny filtering structures where urine is produced in the kidneys.

In a nephron, the following materials move out of capillaries and into capsules: urea, glucose, and some ______

Is the adrenal gland part of the excretory system?
True or False.

The bladder is as big as your brain.
True or False?