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The Human Digestive System

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

'The Human Digestive System' worksheet

Key stage:  KS 2

Curriculum topic:  Animals, including Humans

Curriculum subtopic:  Basic Parts of Human Digestive System

Difficulty level:  

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!

Plate of food

 

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

Toilet

 

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.

 

Digestive system

 

Use this diagram to help you answer the following questions.

What is name of the first part of our digestive system?

our teeth

our mouth

our esophagus

our stomach

In our mouth there are teeth.

 

Mouth

 

Why do teeth chew up food?

to chop it into smaller pieces

to taste our food for us

to release digestive chemicals

How do you think our saliva helps our digestion?

 

saliva helps us taste our food

saliva helps food to slip down the espohagus

saliva kills off bacteria

What is the name for the opening in the digestive system from which waste food is removed?

mouth

tummy button

anus

appendix

After leaving your mouth your food and drink goes down a long tube towards your stomach.

 

What is this tube called?

esophagus (or oesophagus)

windpipe

salivary gland

small intestine

Here are two parts of our digestive system.

 

 

Match the labels to the correct part of the system.

Column A

Column B

A
small intestine
B
stomach

Here is a description of digestion in a particular part of our gut.

 

"When food reaches here, it is churned by muscular walls.  Digestive chemicals and acid are added to help break the food down.  It takes about two hours before the food moves on to the next stage of its journey through the gut."

 

Which part of the digestive system do you think this is describing?

 

 

mouth

stomach

small intestine

large intestine

When the stomach has completed its part of the digestion process, the food passes on to the small intestine.

 

Tick TWO of the main functions (jobs) of the small intestine.

where the food waits before passing on to the next stage

where food is competely broken down

where food is passed into the bloodstream

where extra water is removed from the digested food

What is the name of the long tube that absorbs the remaining water from the digested food, before it passes out of the body?

kidney

bladder

large intestine

small intestine

The RECTUM is the final part of the digestive system.

 

What do you think you'd find in the rectum?

partly-digested food

urine

faeces/feces (poo)

nothing (it's empty)

  • Question 1

What is name of the first part of our digestive system?

CORRECT ANSWER
our mouth
EDDIE SAYS
Our mouth is the first part of the digestive system. This is the opening to the system where food enters for the first time. Do you know what happens to it there?
  • Question 2

In our mouth there are teeth.

 

Mouth

 

Why do teeth chew up food?

CORRECT ANSWER
to chop it into smaller pieces
EDDIE SAYS
One of the functions of the teeth is to chew food into smaller pieces. There are special digestive chemicals (called ENZYMES), some of them in the mouth, and by making the food smaller it means that they work better. Tasting, in fact, happens on our tongue.
  • Question 3

How do you think our saliva helps our digestion?

 

CORRECT ANSWER
saliva helps food to slip down the espohagus
EDDIE SAYS
In fact, one of the jobs of the saliva is to lubricate our food, to help it down the esophagus into the stomach. It also contains some digestive chemicals to start off that process of digestion. Saliva doesn't kill off bacteria - in fact there are lots of 'good' bacteria inside our guts that help us to digest our food properly!
  • Question 4

What is the name for the opening in the digestive system from which waste food is removed?

CORRECT ANSWER
anus
EDDIE SAYS
The ANUS is the hole through which the feces (poo) are passed out into the toilet. The digestive system, which started with fresh food at the mouth, has done a fantastic job in extracting all the useful nutrients from it and leaving just some gooey muck to be removed. Mind you, if you were a rabbit you'd find yourself eating your first lot of poo! Go and look up why on earth they do that!
  • Question 5

After leaving your mouth your food and drink goes down a long tube towards your stomach.

 

What is this tube called?

CORRECT ANSWER
esophagus (or oesophagus)
EDDIE SAYS
The esophagus is a muscular tube that connects the mouth with the stomach (there are two spellings as we are moving from the UK spelling - oesophagus - to the US spelling - esophagus). Food is pushed down this and into the stomach. The windpipe goes to the lungs and the salivary glands are in the mouth and release saliva there.
  • Question 6

Here are two parts of our digestive system.

 

 

Match the labels to the correct part of the system.

CORRECT ANSWER

Column A

Column B

A
stomach
B
small intestine
EDDIE SAYS
The stomach is a bit like a bag - our food stays here, being churned and digested for about 2 hours. Then it is passed through to part B - the small intestine, where the next part of digestion gets going.
  • Question 7

Here is a description of digestion in a particular part of our gut.

 

"When food reaches here, it is churned by muscular walls.  Digestive chemicals and acid are added to help break the food down.  It takes about two hours before the food moves on to the next stage of its journey through the gut."

 

Which part of the digestive system do you think this is describing?

 

 

CORRECT ANSWER
stomach
EDDIE SAYS
Believe it or not, the food has to spend quite a long time in the stomach before it is ready to move into the small intestine. Lots of breaking down of large pieces of food has to happen and, along with those digestive chemicals (enzymes), the stomach walls actually squeeze the food to help mix everything up. Lovely!
  • Question 8

When the stomach has completed its part of the digestion process, the food passes on to the small intestine.

 

Tick TWO of the main functions (jobs) of the small intestine.

CORRECT ANSWER
where food is competely broken down
where food is passed into the bloodstream
EDDIE SAYS
In fact, the small intestine is the place where the food coming from the stomach gets its final breaking down as more chemicals (enzymes) are added to make it soluble (dissolvable) so that it can be passed across the wall of the gut and into the blood. Then it is carried off around the body to deliver its energy load. Extra water won't be absorbed from the digested food until it's in the large intestine.
  • Question 9

What is the name of the long tube that absorbs the remaining water from the digested food, before it passes out of the body?

CORRECT ANSWER
large intestine
EDDIE SAYS
If you went for kidney or bladder, they aren't tubes and they are to do with urine, rather than food digestion. The large intestine receives the remains of the food that has had all the good nutrients taken out of it. Now there's just excess water that needs to be recovered - that's the job of the large intestine.
  • Question 10

The RECTUM is the final part of the digestive system.

 

What do you think you'd find in the rectum?

CORRECT ANSWER
faeces/feces (poo)
EDDIE SAYS
Once all the other parts of the gut have done their job, there's nothing of value left in the food, so it waits in the rectum before it passes out of the body as feces (or poo). By the way, that's another part of our digestive system undergoing a spelling change (faeces = UK/feces = US)!
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