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Digestive and Excretory Systems Unit Test Review Sheet
1. What are the three function of the digestive system?
to break down food into molecules to be used by the body for energy
eliminate waste
absorb nutrients into the blood
2. What organ system is responsible for each of the following processes: urinating, defecating, and
vomiting (each one may be different)?
Urination- Excretory System
Defecating and Vomiting- Digestive System
3. In which organ does the majority of chemical digestion take place?
Small intestine
4. In which part of the digestive system does digestion occur first?
Mouth
5. List all of the organs that are part of the digestive system.
See your binder
6. What is the function of the excretory system?
To remove waste from the body
7. What is the major organ in the excretory system?
The kidneys
8. If there is something wrong with your urine, what organ is probably
damaged?
The kidneys
9. During hot weather, what is the major source of water loss?
Sweating (perspiration)
10. What happens to the amount of sweat as the temperature decreases?
It decreases when the weather is cooler
11. What organ system is shown in the diagram below?
Digestive System
Average Daily Loss of Water in Humans (ml)
Source
Normal
Hot
Extended
Weather Weather
Heavy
Exercise
Lungs
350
250
650
Urine
1400
1200
500
Sweat
450
1750
5350
Digestive
200
200
200
Waste
12. Write the name of each organ next to the arrow pointing at it.
A- Esophagus
B- Stomach
C- Pancreas
D- Rectum
E- Small Intestine
F- Large Intestine
G- Liver
13. Write the function of each organ next to its name.
Use p. 113 in your binder
14. Describe what happens during chemical digestion.
Enzymes are added to food molecules to break them down
chemically
15. Put the following steps in order:
a. Food churned in the stomach 3
b. Food chewed in the mouth 1
c. Excess water absorbed by the large intestine 5
d. Nutrients absorbed small intestine 4
e. Food pushed through the esophagus 2
16. What type of energy transformation takes place when you use the energy in food to power your
muscles and move?
Chemical  kinetic
17. What type of energy transformation occurs when food is broken down to produce heat to regulate
your body temperature?
Chemical  thermal
18. Which nutrients are made up of amino acids?
Proteins
19. During chemical digestion carbohydrates are broken down into ______________ such as glucose.
Sugars
20. What is the body’s preferred source of energy, and where do they come from?
Carbohydrates, fruits, vegetables, grains.
21. What organ system transports the nutrients from the digestive system to all of the cells in the body?
Circulatory System
22. What is the name of the organ system shown in the
diagram to the left? Excretory System
23. Write the name of each structure in the diagram next to
the arrow pointing at it.
A- kidney
B- ureter
C-bladder
D- urethra
24. Write the function of each structure next to its name.
Use your binder
25. Describe the flow of urine from its formation until it is
excreted from the body. Formed in the kidney, then moves
through the ureters, bladder, then released through the
urethra
26. What is urine mostly made of? What else is in it?
Water, salt, other chemicals
27. Where does the urea in urine come from?
The blood
28. List all of the waste products that the body excretes.
Salts, urea, water, carbon dioxide
29. Which excretory organ eliminates water and some chemical wastes in perspiration (sweat)? skin
30. If doctors wanted to test a person to see if there were illegal drugs in their blood, which substance
would they most likely test? urine
31. Your digestive system is made up of smooth muscles which are involuntary.
32. How do the skeletal system and the digestive system work together?
The bones protect the digestive organs
33. How do the excretory and respiratory systems interact?
The lungs remove carbon dioxide
34. How does the circulatory system and excretory system work together in your body?
Blood gets sent to the kidneys to be filtered