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The Human Digestive System 3

In this worksheet, students will be asked to identify different parts of the human digestive system and their functions.

'The Human Digestive System 3' worksheet

Key stage:  KS 2

Curriculum topic:  Animals, including Humans

Curriculum subtopic:  Basic Parts of Human Digestive System

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

Have you ever thought about how all that yummy food makes its way through your body, and where it goes?

 

MMMmmm! Yummy!

 

Well, you probably know where some of it ends up!

 

But where does the rest of it go?

Why do we need to eat?

 

In this worksheet, you are going to learn about our digestive system.

This is what we call the area in our body that deals with all the food that goes into our body and goes out of our body.

 

 

Use this diagram to help you answer the following questions.

The mouth is the first part of the digestive system.

Which important actions take place in here?

Tick three answers.

teeth start to chew our food

the tongue collects the food at the front of the mouth

saliva starts to break down the food

food is swallowed

Where is our saliva, or spit, made?

in our tongue

in our stomach

in our salivary glands

What connects our mouths to our stomachs?

small intestine

esophagus

large intestine

Look at this diagram.

 

 

Name the different parts.

Column A

Column B

A
small intestine
B
stomach
C
esophagus

Look at this diagram.

 

 

Match the statements below.

Column A

Column B

saliva
contains special chemicals that start the breakdow...
gastric acid
a special liquid made by the stomach, which breaks...
chyme
a thick mass of partly digested food formed in the...

Read this information. It will help you answer questions 6–8.

 

******************

After leaving the stomach, the partly digested food enters the duodenum, the first part of the small intestine. Digestive juices, made in the pancreas, enter the duodenum and help to further break down the chyme. The food molecules then pass through the rest of the small intestine. This is where the absorption process takes place: nutrients and minerals are absorbed through the lining of the intestine into the bloodstream. From here the blood passes through the liver, which cleans the blood, removing any toxins (poisons). The liver also makes a substance called bile which helps to break down any fats in our food. The gall bladder stores the bile that is made by the liver.

******************

 

Where are the food molecules absorbed into the body?

in the small intestine

in the pancreas

in the liver

What do the nutrients and minerals get absorbed into?

the skin

the blood

the liver

Why is the liver important?

Tick two answers.

it makes bile which breaks down fats

it cleans toxins out of the blood

it holds absorbed food

Undigested food passes out of the small intestine, into where?

into the blood

into the large intestine

into our saliva

What do you think happens in the large intestine?

undigested food forms faeces (poo)

undigested food returns to the stomach

  • Question 1

The mouth is the first part of the digestive system.

Which important actions take place in here?

Tick three answers.

CORRECT ANSWER
teeth start to chew our food
saliva starts to break down the food
food is swallowed
EDDIE SAYS
Our teeth break down the food into smaller pieces. Enzymes in saliva (spit) also start to break the food down. Once the food has started to break down we can taste it on our tastebuds. We swallow the food and it passes into the next part of the digestive system.
  • Question 2

Where is our saliva, or spit, made?

CORRECT ANSWER
in our salivary glands
EDDIE SAYS
Spit, or saliva, is made in the salivary glands.
  • Question 3

What connects our mouths to our stomachs?

CORRECT ANSWER
esophagus
EDDIE SAYS
The esophagus or oesophagus is the tube that connects our mouths to our stomachs.
  • Question 4

Look at this diagram.

 

 

Name the different parts.

CORRECT ANSWER

Column A

Column B

A
esophagus
B
stomach
C
small intestine
  • Question 5

Look at this diagram.

 

 

Match the statements below.

CORRECT ANSWER

Column A

Column B

saliva
contains special chemicals that s...
gastric acid
a special liquid made by the stom...
chyme
a thick mass of partly digested f...
EDDIE SAYS
Gastric acid is made in the stomach. It helps break down the food in your stomach into digestible molecules. The churning action of your stomach also helps break down the food. The thick liquid of partly digested food and molecules is called chyme.
  • Question 6

Read this information. It will help you answer questions 6–8.

 

******************

After leaving the stomach, the partly digested food enters the duodenum, the first part of the small intestine. Digestive juices, made in the pancreas, enter the duodenum and help to further break down the chyme. The food molecules then pass through the rest of the small intestine. This is where the absorption process takes place: nutrients and minerals are absorbed through the lining of the intestine into the bloodstream. From here the blood passes through the liver, which cleans the blood, removing any toxins (poisons). The liver also makes a substance called bile which helps to break down any fats in our food. The gall bladder stores the bile that is made by the liver.

******************

 

Where are the food molecules absorbed into the body?

CORRECT ANSWER
in the small intestine
  • Question 7

What do the nutrients and minerals get absorbed into?

CORRECT ANSWER
the blood
  • Question 8

Why is the liver important?

Tick two answers.

CORRECT ANSWER
it makes bile which breaks down fats
it cleans toxins out of the blood
  • Question 9

Undigested food passes out of the small intestine, into where?

CORRECT ANSWER
into the large intestine
EDDIE SAYS
The large intestine is the final section of the digestive system.
  • Question 10

What do you think happens in the large intestine?

CORRECT ANSWER
undigested food forms faeces (poo)
EDDIE SAYS
Once the chyme reaches your large intestine, there are hardly any nutrients left. However, the large intestine still has an important job to do: it takes any leftover water in the chyme and reabsorbs it into the body. Any undigested food then becomes hard, because the water has been removed. We call this: faeces (poo). Bacteria in the large intestine also try hard to digest any final nutrients into the body, before we go the toilet and it is too late!
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