Interactive Digestive System Review
Adapted from http://www.science-class.net
Name ____________________
Date ____________ Period __
1. Begin by going to this website: http://www.harcourtschool.com/activity/digest/
4. Click on
5. Click on each organ, one at a time. Read the information provided to fill in the review page.
6. Click on
7. Drag each food over to the mouth, one at a time. Read the information provided to fill
in the review page.
8. If you finish early, go to http://kitses.com/animation/swfs/digestion.swf for extra review.
Digestion begins in the 1)_______________________. Teeth grind up
food into smaller pieces. This is called mechanical digestion. Saliva
breaks down 2)__________________________. This is a type of
chemical digestion. Saliva is found in the 3)______________________
__________________.
As you swallow, muscles in the esophagus 4)_______________________ in
waves to move food down into the 5)_____________________________.
Folds in the lining of the esophagus trap 6)_____________________ so that the
esophagus is slippery and food can move down easily.
In the 7)____________________________, food mixes with digestive juices
to make a thick, soupy substance called chyme. The digestive juices begin the
process of 8) __________________________________________________
_________________________________________________________.
The mixture leaves the stomach to move into the small intestine, where
9)_____________________ are absorbed into the bloodstream, by diffusion.
Tiny fingerlike folds called villi line the 10)__________________ __________.
Nutrients passing through these folds have many chances to make their way into
the 11)________________________ __________________________.
The work of the large intestine is to 12)________________________________
_________________________________________________________.
The large intestine has a lining with many13) _________________________.
The bumps on the wall of the large intestine help the intestine
14)___________________ _________________________________.
Solid waste is collected in the15) ___________________________. Two rings
of 16) __________________________ surround the rectum. They are usually
contracted to hold waste 17)___________. When the muscles are
18)_________________, waste moves out of the body through the 19)_________.
Milk contains 20)_________________, 21)_________________________,
22)_________________________, and 23)_________________________.
Digestive juices in the stomach begin to break down the 24__________________________.
After milk moves in to the small intestine,25) __________________ ______ _________
____________________________________________ are absorbed. The mineral
_____________________ moves into the bloodstream as do 26)____________________.
As fat moves through the small intestine, 27______________ from the
28)_____________________ is added to the mixture. Bile helps the small intestine
29)__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
Extra 30)_________________ is stored for later use.
Broccoli is made up of 31) __________________________, 32)______________________,
and 33)___________________________.
Digestive juices in the stomach begin to 34)___________________ _________________
the broccoli. In the small intestine, 35)_________________________ are absorbed. Water
and fiber move to the large intestine where the 36)_______________________ is removed.
37)__________________________ in the intestine push hard to move the fiber along. The
pushing helps keep the intestine 38)_____________________________.
Fiber moves to the 39)________________________. Although fiber is 40)____________
digested by the body, it helps keep the digestive system 41)______________________.
Chicken is mostly 42)_______________________. In the small intestine protein
is absorbed into the 43)___________________________. The body uses
protein to 44) __________________________________________________
_________________________________________________________.
Pasta is a food that contains a lot of 45)_______________________________.
46)_________________________ begins to break down the carbohydrates in
the pasta.
In the small intestine, nutrients in the pasta are absorbed into the bloodstream to
provide 47)________________________ ______________________
Many fruit juices contain a lot of 48)_________________________ and a few
49)______________________________. Sugars are absorbed
50)___________________ into the bloodstream. Because of this eating foods
with lots of sugar provides 51)______________________________________
_________________________________________________________.
Unfortunately, energy from sugar doesn’t last 52)__________________, and is
soon followed by a 53)________________________.