Digestive System Stations Lab
Name: ____________________
Date: ______ Block: ______
Chemical vs. Mechanical Digestion
________________________ is using enzymes and other digestive juices to break molecules into smaller
molecules.
Places where this takes place: _______________________________________________
________________________ is break/mashing/tearing food into smaller and smaller pieces
Places where this takes place: _______________________________________________
Peristalsis
1. What is the muscular flap called that we force open when we swallow?
(This helps separate the trachea from the esophagus)
____________
Describe the process of peristalsis: _______________________________________________
_______________________________________________
Crash Course
1. Why do different animals have different digestive systems?
____________________________________________________________________________
2. Name two ways that cows have evolved (adapted over time) to digest grass and other plants?
____________________________________________________________________________
3. What are two ways we maximize surface area to help us digest food?
Way #1: _______________________________________________________________________
Way #2: _______________________________________________________________________
4. What does the chemical “pepsin” break down in your stomach?
___________________________
5. What are Villi lined with?
___________________________
Villi
Where are villi found? _____________________
What is the main purpose for villi? _______________________________________________________
Video #2: Describe the appearance of the actual villi that you see during this video:
____________________________________________________________________________
Insert a picture of the Small intestines (Choose the middle of the three parts)
-Label the villi in the picture
Stomach Ulcers
Stomach Ulcers are “sores” or open wounds of the stomach. We used to think they were caused by spicy food
or alcohol. What 3 things are now believed to be main causes?
__________________________
___________________________
___________________________
2. What are two conditions or choices people make that put them “at risk” of getting ulcers?
One condidtion: ________________________________________________________________
One condidtion: ________________________________________________________________
Insert a picture of the stomach slide here. Label your prediction of epithelium (skin) vs. smooth muscles that
line the stomach and help with mechanical digestion:
Liver
1. How does the liver help manage the sugar content in your blood?
____________________________________________________________________________
2. How does bile help with digestion and where does it go for storage after it’s produced?
____________________________________________________________________________
Pancreas
1. How does insulin manage sugar in your blood?
____________________________________________________________________________
2. How does diabetes affect your blood? (use insulin in your answer!)
____________________________________________________________________________
What is the difference between chemical
and mechanical digestion?
https://goo.gl/v0uiac
Peristalsis:
Video #1:
Learn about the epiglottis here:
https://goo.gl/EIc9pr
Video #2
Watch an X-Ray of someone swallowing food!
https://goo.gl/yyH9jc
Video #3:
What is peristalsis?
https://goo.gl/9fetfc
Crash Course Digestive system:
https://goo.gl/jm0mkH
Villi
What are villi?
https://goo.gl/wLT8R9
Vocab: Epithelium is a science word for “skin” tissue
https://goo.gl/HHDUYf
Watch this guy take a camera through his digestive tract!
Villi Slide:
Ulcers
Read/listen to the first two pages of the website below:
http://goo.gl/VutKI7
Stomach slides:
Liver
https://goo.gl/pc7q4a
Pancreas
https://goo.gl/n6G8o8