Notebook Page

The Excretory System!

Functions of the system   

The excretory system

 provides a way

 for various wastes

to be removed from the body.

Organs or parts of the system

<!--[if !supportLists]-->·         <!--[endif]-->Lungs- get rid of the wastes,

 carbon dioxide and water vapor

<!--[if !supportLists]-->·         <!--[endif]-->Kidneys- main organ-contains

millions of microscopic chemical

filtration factories called nephrons

<!--[if !supportLists]-->·         <!--[endif]-->Liver- removes excess amino acids

<!--[if !supportLists]-->·         <!--[endif]-->Skin-has two main layers- Epidermis

and the Dermis

Why we need the system?

We need this system to remove

wastes such as excess water and

salts, carbon dioxide, and urea

 (a nitrogen waste)

How this system works with

two other systems

<!--[if !supportLists]-->·         <!--[endif]-->The digestive system is the pathway

for food and water to enter the body

<!--[if !supportLists]-->·         <!--[endif]-->The respiratory system enables

oxygen to enter and carbon dioxide and water vapor to leave the body

Problem/diseases that can occur in this system

<!--[if !supportLists]-->·         <!--[endif]-->Kidney/Urologic Infections

<!--[if !supportLists]-->·         <!--[endif]-->Cystitis

<!--[if !supportLists]-->·         <!--[endif]-->Urethritis

<!--[if !supportLists]-->·         <!--[endif]-->Bed wetting

<!--[if !supportLists]-->·         <!--[endif]-->Kidney stones

<!--[if !supportLists]-->·         <!--[endif]-->Pyelonephritis

<!--[if !supportLists]-->·         <!--[endif]-->Nephritis

Facts about this system

<!--[if !supportLists]-->·         <!--[endif]-->Only 40% of people smell the odor of urine

<!--[if !supportLists]-->·         <!--[endif]-->It excretes about 1 to 1.5 liters of urine each day

<!--[if !supportLists]-->·         <!--[endif]-->Approximately 1% of human sweat is composed of salt an urea

<!--[if !supportLists]-->·         <!--[endif]-->Most humans could survive with only 1/3 of one kidney

<!--[if !supportLists]-->·         <!--[endif]-->Kidney receives and filters almost 1 liter of blood per minute

<!--[if !supportLists]-->·         <!--[endif]-->Urinary bladder can store up 470  milliliters of urine before releasing it

<!--[if !supportLists]-->·         <!--[endif]-->Perspiration gets rid of body wastes

How it works

<!--[if !supportLists]-->·         <!--[endif]-->Waste gases are carried by blood traveling through the veins to the lungs

•Dead cells and sweat are removed from the body through skin

•kidneys filter the wastes from the blood (forms urine)

•Urine goes into ureters ( carry waste to  urinary bladder)

•bladder stores urine until muscular contractions force urine out of the body through urethra

What systems wouldn't function without this system:

•Digestive system- pathway for food and water (without excretory system, body would be filled with waste = explosion)

• Respiratory system- allows oxygen into the body and (the waste) carbon dioxide out