The excretory system removes waste from the body through urine and feces. It includes the kidneys, ureters, urinary bladder, and urethra. The kidneys filter wastes from the bloodstream to produce urine, which contains urea and other toxins. The urine travels from the kidneys to the bladder through ureters, and is then excreted through the urethra. The excretory system works with the digestive system, removing waste products that are generated as food is broken down in 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,
