Lesson Worksheet: The Human Digestive System Science
In this worksheet, we will practice identifying the main organs of the digestive system, outlining how they are adapted for their functions, and suggesting ways to keep the digestive system healthy.
Q1:
Which organ connects the mouth to the stomach?
- ALiver
- BLarge intestine
- CSmall intestine
- DGullet (esophagus)
- ERectum
Q2:
The figure shows an organ of the human digestive system.
What is the name of this organ?
- AStomach
- BGullet
- CSmall intestine
- DRectum
- ELiver
Q3:
In which part of the digestive system is water (but not food) absorbed into the body?
- ASmall intestine
- BStomach
- CRectum
- DLarge intestine
- EGullet
Q4:
Complete the sentence: The system is a group of organs that work together to break down food.
- Acirculatory
- Bdigestive
- Crespiratory
- Dreproductive
- Enervous
Q5:
Complete the sentence: Big molecules need to be broken down into small molecules so that they can be into the blood.
- Aabsorbed
- Bdigested
- Cfiltered
- Dexcreted
Q6:
Complete the sentence: X are stored in the Y until they leave the body through the Z .
| X | Y | Z | |
|---|---|---|---|
| A | Feces | large intestine | rectum |
| B | Enzymes | anus | rectum |
| C | Fibers | anus | rectum |
| D | Feces | rectum | anus |
| E | Enzymes | large intestine | anus |
- AC
- BE
- CA
- DD
- EB
Q7:
What is present in the digestive juices in the small intestine that help break down large molecules of food?
- ABacteria
- BEnzymes
- CFeces
- DAcids
Q8:
Food enters the digestive system through the mouth.
What is the function of the teeth?
- ATo roll the food into a ball
- BTo move the jaw up and down
- CTo break the food into smaller chunks
- DTo add enzymes to the food
What liquid is added to the food in the mouth?
- ASaliva
- BSweat
- CAcid
Q9:
What type of tissue moves the food through the digestive system?
- ABlood
- BBone
- CMuscle
- DNervous
Q10:
The figure shows a 3D illustration of the inside of the small intestine.
What feature, seen in the image, shows that it is well adapted for its function of absorption?
- ALarge surface area
- BPresence of bacteria
- CMany blood capillaries
- DThick layer of muscle
- EThin wall
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