The excretory system collects and removes wastes from the body through urine and feces. It includes the kidneys, ureters, urinary bladder, and urethra. The kidneys contain nephrons that filter wastes from the blood to produce urine, which contains urea and other toxins. The urine flows from the kidneys through the ureters to the bladder, where it is stored until exiting the body through the urethra.

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. 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,

5. Pictures

6. 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