Chapter 18.3 Review

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Small, hard crystals formed from substances in the urine are called

Urination is essential to life because urine contains oxygen, which would be toxic to the body.

The organs that filter waste products from the blood and maintain the body’s acid-base and water balances are the

Nephrons are the functional units of the kidneys.

The organ that acts as a reservoir for urine is the

The presence of excess urea and other chemical waste products in the blood is called

Sphincter muscles of the bladder relax and allow urine to flow through the urethra.

A bacterial infection of the bladder is