Download Digestive System Packet

Chapter 3
Lesson #3 The Digestive System
p. 74-77
T or F
________ Your cells use the food you eat.
________ Your food needs to be changed before your cells can use it.
________ Your food enters your blood stream to get to the cells.
The Mouth and the Esophagus
________________ is the first step in digestion.
What is the esophagus? __________________________________________________
______________________________________________________________________
The esophagus _____________ food to the stomach by ___________________ its
rings of muscles in a pattern. This takes 2-3 seconds.
Draw a picture:
What role do your teeth, tongue, salivary glands and epiglottis play in digestion? What
page would you find this information on? __________
role of teeth: _____________________________________________________
role of tongue: ___________________________________________________
role of salivary gland: _____________________________________________
____________________________________________________________________
role of epiglottis: _________________________________________________
____________________________________________________________________
Check Point:
What is the job of the digestive system? ____________________________________
_____________________________________________________________________
Why does the food you eat need to be changed for use by your cells? ______________
______________________________________________________________________
______________________________________________________________________
Complete WBp. 192 - What is the Mouth?
Stomach:
At the end of the esophagus is a tight round muscle
oesphageal___________________. When you _________________,this muscle
________________ opens to let food ______ your stomach. Then it ______________
so food does not go back up the espohagus.
Where is your stomach located? ___________________________________________
How does the stomach work to digest foods? _________________________________
______________________________________________________________________
______________________________________________________________________
The stomach walls are lined with ________________________. This protects the
stomach lining from the gastric juices - Hydrochloric acid - this will eat through our skin.
Why does the stomach have folds in its walls? ________________________________
______________________________________________________________________
Other facts:
Illustrate:
Intestines:
Small Intestines The _________________ squeezes partly digested food into a ______________,
winding tube called the ____________________________. It’s __________________
move the food in one ______________________.
What is the job of the small intestine? _______________________________________
______________________________________________________________________
______________________________________________________________________
What do the liver and pancreas do? _________________________________________
______________________________________________________________________
When digestion is complete, what happens? __________________________________
______________________________________________________________________
What are villi and how do they work? ________________________________________
______________________________________________________________________
______________________________________________________________________
How long are the small intestine? ___________________ How wide? ______________
Large Intestines The large intestine is known as the ____________________.
Some food cannot be __________________ and this material enters the
_____________ _________________. Helpful __________________ live in the large
intestine. Some of this bacteria make _______________ that your body can use.
The job of the large intestine: takes _________________ and __________________
from the waste making the waste ____________________.
The large intestine pushes the __________________ into the _________________. It
stays here until you are ready to go to the ___________________________. The waste
then travels to _______________ where it is pushed out of the body. FLUSH!
How long are the large intestine? _______________________ How wide? __________
Check Point:
Why does your stomach have folds in the walls?
______________________________________________________________________
______________________________________________________________________
What intestine does digestion occur in? ______________________________________
List the digestive system organs in the correct order
The Urinary System
p. 78-79
The job of the urinary system: _____________________________________________
______________________________________________________________________
______________________________________________________________________
Kidneys
Illustrate:
Kidneys - 1. ____________________________________________________________
2. ____________________________________________________________
______________________________________________________________
They are located ______________________________________________________
____________________________________________________________________
The kidneys take out some ________________ with the waste. This mix of water and
waste is ______________________. The ______________________ carries urine
away from the kidneys to the ______________ _________________. This bladder
stores urine until you go to the bathroom. There is a strong muscle,
_________________, that keeps the urine inside.
Check Point:
How do the kidneys regulate your blood? _____________________________________
______________________________________________________________________
How does the digestive system work with the circulatory system? _________________
______________________________________________________________________
______________________________________________________________________