The excretory system removes waste from the body through urine and feces. It includes the kidneys, which filter waste from the blood to produce urine, and the ureters, urinary bladder, and urethra, which transport urine from the kidneys out of the body. The kidneys contain nephrons that filter waste in stages, removing wastes while retaining needed materials in the blood. Once food is digested, waste enters the excretory system from the digestive system and is eventually eliminated from the body.

1. The Excretory
System
By:
Andrew Perdock, Chase Witherspoon, Josh
Isenhour, and Nabil Ranjbar

2. What It Is
The excretory system is the system in the body
that collects wastes produced by cells and
removes the wastes from the body. The removal
process is known as excretion.

3. What It Does
The excretory system eliminates wastes from the
body (pee and poop).

4. Where It Happens
Hopefully, you know how to eliminate wastes in
the toilet and not in a diaper. But seriously,
when you eat food and the chemicals of the food
break down, that is called the digestive system.
Food eventually ends up in the excretory system.
Once it is in the excretory system, wastes are
eventually eliminated.

5. How It Happens
The structures of the excretory system that eliminate urea, water, and
other wastes include the kidneys, ureters, urinary bladder, and urethra.
The two kidneys are the major organs of the excretory system. Two
wastes that your body must eliminate are excess water and urea. The
wastes are eliminated in urine, a watery fluid that contains the urea and
other wastes. Urea is a chemical that comes from the breakdown of
proteins.
Urine flows from the kidneys through two narrow tubes called ureters.
The ureters carry the urine to the urinary bladder, a sacklike muscular
organ that store urine. Urine flows from the body through a small tube
called the urethra.
Each kidney contains about a million nephrons. Nephrons are tiny
structures that remove wastes from blood and produce urine. The
nephrons filter wastes in stages. First, both wastes and needed materials,

6. Pictures

7. Resources
http://health.allrefer.com/pictures-images/
kidney-anatomy.html
Mr. Buda’s Respiratory and Excretory Section 3
Reading Summary
http://wikieducator.org/
Excretory_System_Answers