Download Digestive System

NAME:________________________
Digestive System Review Activity
Humans get their energy from the ___________ they eat.
Food must be broken down for the body to use it. Energy available in food is called ___________.
Steps of Digestion:
1.)
Digestion begins in the ___________, where ________________ begin smashing and grinding the food.
2.)
In the mouth the ______________ glands release ___________ which includes ______________,
______________, and ________________. _____________ is responsible for breaking polysaccharides into
______________________.______________ is responsible for killing any ___________________________.
The _______________ works to ________________ the food so it moves through the digestive tract easier.
3.)
The __________ then pushes the _________(now called the ___________) to the __________ or the back of
the throat. When we swallow this food the ____________ closes over the airway to prevent choking.
4.)
Food moves by _____________________ or contractions of the esophagus. ____________ lines the
esophagus to ensure smooth movement of the bolus.
5.)
Then the stomach breaks down ________________ using ____________ juice, which contains
_______________________ and __________________. _____________ protects the stomach from the acid.
A hole in the stomach or intestine is called a ____________.
6.)
The first section of small intestine is called the ________________________, where secretions from the
________________ and ________________ act as catalysts to lower _____________ ____________ so
_____________________ can occur faster.
***Carbohydrates are broken down into ________________________
***Proteins are broken down into ___________ acids
***Lipids are broken down into _____________ acids and ____________
Liver produces ____________, the ___________________________ stores the bile. Bile is used to __________
up (emulsify) fat globules into fat droplets.
7.)
The small intestine is lined with ________________ which increase its _________ ________ and allows for
more ____________ of nutrients
8.)
The large intestine has a larger______________, but is shorter in length than the small intestine. The large
intestine is colonized by _____________, which produce ________________________ and
______________________. Vitamin B is used for _________________ and Vitamin K is used for
_________________. The large intestine is also responsible for the absorption of _____________ to aid in
the formation of feces.
9.)
Fill in the table below.
Secreting Area
Salivary Glands
Glands and Cells in
stomach
Pancreas
Liver
Gallbladder
Bacteria in Large
Intestine
What is released?
Where is it released to?
Job it does
The Digestive System:
Figure 29-1
1. Which structure shown in Figure 29-1 has completes peristalsis? What is the name of this structure?
2. Which structure shown in Figure 29-1 is responsible for mechanical digestion and breaking down proteins? What is the
name of this structure?
3. Which structure shown in Figure 29-1 produces bile? What is the name of this structure?
4. What is the name of the structure that stores the chemical that emulsifies lipids? Label that structure G.
5. Enzymes that hydrolyze carbohydrates, proteins, and lipids are produced in which structure shown in Figure 29-1? What is
the name of this structure?
6. Which structure shown in Figure 29-1 contains villi, small fingerlike projections that aid in absorbing nutrients? What is the
name of this structure?
7. Which structure shown in Figure 29-1 is the responsible for absorbing water? What is the name of this structure?
8. Explain why hydrolysis and surface area are so important to the digestive system?