To remove waste and excess water from the body (urine)
Function of the Excretory System
Organs that filter waste from the blood. They extract toxic substances and form urine.
Kidneys
Urine flows out of the kidneys through these tubes.
Ureters
The sack where urine is stored before it is released from the body.
Bladder
The tube through which we expel urine.
Urethra
The muscle that prevents urine from leaving the bladder before you are ready to urinate.
Sphincter
The tube through which urine flows out of our bodies. It includes the ureters, bladder, and urethra.
Urinary tract
The waste liquid that the kidneys extract. It passes through the urinary tract to leave the body.
Urine
Another way we rid of waste and excess fluid. A mixture of water and salt that is expelled through pores in the skin.
Sweat
The holes in the skin by which sweat leaves the body.
Pores
