The Digestive and Urinary Systems
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Transcript The Digestive and Urinary Systems
The Digestive and Urinary
Systems
Chapter 3, Lesson 3
8th Grade Health
The Digestive System
Breaks down food into nutrients that the
body can use!
http://kidshealth.org/misc/movie/bodyba
sics/digestive_system.html
Organs of the Digestive
System
Esophagus:
– Tube which moves swallowed food from the mouth
to the stomach.
Stomach:
– Where the food is processed. Food is mixed with
acids and enzymes to break it into tiny pieces.
Small Intestine:
– Nutrients and water are absorbed from the food
here through the Villi
Villi- tiny fingerlike structures that absorb water and
nutrients and deliver to the bloodstream.
– Small intestine is not actually small. It is around
22 feet in length!
Organs of the Digestive
System
Liver:
– Large gland that produces bile, a substance the
helps in the digestion of fats.
Gallbladder:
– Organ that stores bile until it is released in the
small intestine.
Pancreas:
– A gland that produces digestive enzymes and
chemicals that control blood sugar levels.
Organs of the Digestive
System
Large Intestine:
– Undigested materials from the small
intestine enter here. The large intestine
prepares this material to leave the body.
– Another name for the large intestine is the
colon.
After the material travels through the
large intestine, it will leave the body as
solid waste.
The Digestive System
Locate the following
structures:
•Esophagus
•Stomach
•Liver
•Small Intestine
•Large Intestine
•Gallbladder
•Pancreas
Picture from:
http://eatwellgetwell.files.wordpress.com/2006/05/digestion_goo
d2.jpg
How does digestion work?
See how food
moves through our
body!
– http://player.discover
yeducation.com/inde
x.cfm?guidAssetId=9
7D62D38-F86A45F4-9B1FFC826B77F807&bln
FromSearch=1&prod
uctcode=US
The Urinary System
Removes liquid wastes.
Organs work together to filter wastes
from the blood and then to remove
wastes from the body.
Eliminates waste in the form of Urine.
– Urine: pale yellow liquid composed of
water, salts, and other waste substances.
Organs of the Urinary System
Kidney:
– Organ that filters water and dissolved
wastes from the blood
– Helps maintain proper levels of water and
salt in the body.
– Produces urine.
Ureter:
– Narrow tube that connects the kidney to
the bladder.
Organs of the Urinary System
Ureter Cont’d:
– Muscles continuously squeeze and relax to keep
the urine moving.
Bladder:
– Holding tank for urine.
– As the bladder fills, it expands.
– A normal bladder can hold about 2 cups of urine.
– When it’s full, receptors produce the urge to
urinate.
Organs of the Urinary System
Urethra:
–
The tube that allows urine to pass out of
the body from the urinary bladder.
Questions:
1. How is water waste eliminated from
the body?
2. How do the kidneys protect our body?
Urinary System
Identify the
Following:
–
–
–
–
Kidneys
Ureter
Urethra
Bladder
Picture from:
http://academic.kellogg.cc.mi.us/her
brandsonc/bio201_McKinley/f271al_urinary_system__c.jpg
How do our Kidneys work?
The parts of our kidneys that work as
filters are called “nephrons.”
Each kidney has over 1 million
nephrons.
All of the water in the body (about 5
quarts) is filtered through the kidneys
every 45 minutes.
– Your body filters 160 quarts of water a day!
Taking Care of our Digestive
and Urinary Systems
1.
Drink Plenty of Water
2.
Maintain healthful blood pressure.
3.
Your body needs 6-8 glasses of water a day to
keep your kidneys functioning the right way!
High blood pressure can damage your kidneys.
Eat slowly.
When you eat slowly, you ensure easy
swallowing and more efficient digestion of food.
Taking Care of our Digestive
and Urinary Systems
4.
Eat plenty of dietary fiber.
Why?
Ensure regular bowel movements
Prevent chronic constipation
Improves several conditions including heart disease
and diabetes.
Sources:
Fruits
Vegetables
Whole Grains
Homework!
For one day, keep a record of what you
eat and drink. Analyze your record to
see if you are practicing ways to care
for your digestive and urinary systems.
– Look to see if you are drinking 6-8 glasses
of water per day and how many fiber
containing foods you eat!
Classwork – 1/15
Write two paragraphs (5 sentences
each) about what you found and how
you can improve!
Come up with a day’s worth of food that
will meet the dietary fiber and water
needs for the day!