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Breathing and the Respiratory System

The worksheets describes the organs involved in the respiratory system and will test a students knowledge of the respiratory processes.

'Breathing and the Respiratory System' worksheet

Key stage:  KS 3

Curriculum topic:  Biology: Structure and Function of Living Organisms

Curriculum subtopic:  Gas Exchange Systems (Breathing)

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

Breathing... it is something that you do all the time, every day, without even thinking about. Even as you read this your respiratory system is at work, taking air both in and out of your lungs, but how does it work? 

 

The respiratory system has two very important jobs to do. The first is to supply the blood with oxygen; the second is to remove any waste carbon dioxide from the blood. 

The respiratory system involves the mouth, nose, trachea (windpipe), lungs and diaphragm (the layer of muscles found under your lungs).  

 

 

Breathing In

Right, take a deep breath. As you inhale, the air travels through your nose and mouth, down the trachea and then splits into your two lungs. But that's not all...

  • If you put your hands on your ribcage you will notice that they expand up and out as you breathe in, allowing the air to fill your lungs. 
  • Your diaphragm will also contract, pulling downwards to allow more air into the lungs.  

 


Breathing Out

As you breathe out, the opposite occurs. The exhaled air leaves your lungs, travels up the trachea and then leaves your body through your nose and mouth.

  • If you put your hands on your ribcage you will notice that it drops in and down as you breathe out, allowing the air to be pushed out of the lungs. 
  • Your diaphragm will also relax, pulling upwards allowing more air to be pushed out of the lungs.  

 

What is the role of the respiratory system?

To break down food into small soluble molecules.

To carry blood around the body.

To supply the blood with oxygen and remove waste carbon dioxide.

To supply the blood with water.

Which of the following are involved in the respiratory system? 

mouth

nose

oesophagus

trachea

stomach

liver

lungs

small intestine

diaphragm

bowel

What is the name given to the layer of muscles found under the lungs that helps to to move air into and out of the lungs?

What happens to the ribcage as you breathe in?

it expands up and out

it relaxes in and down

What happens to the diaphragm as you breathe out?

it contracts pulling downwards

it relaxes moving upwards

Match the correct part of the respiratory system with what it does during inhalation. If you can't read all of the words in the boxes, hover your mouse over them.

Column A

Column B

trachea
contracts downwards
ribcage
moves out and up
diaphragm
allows air from the mouth and nose to pass into th...

From the diagram below, what is picture A representing? 

 

breathing out

breathing in

Which of the following occur when you breathe in and out? 

 Breathing InBreathing Out
Mouth and nose: Air in
Mouth and nose: Air out
Ribcage: down and in
Ribcage:up and out
Diaphragm: contract downwards
Diaphragm: relax upwards
  • Question 1

What is the role of the respiratory system?

CORRECT ANSWER
To supply the blood with oxygen and remove waste carbon dioxide.
EDDIE SAYS
The role of the respiratory system is to supply the blood with oxygen and to remove waste carbon dioxide from the body.
  • Question 2

Which of the following are involved in the respiratory system? 

CORRECT ANSWER
mouth
nose
trachea
lungs
diaphragm
  • Question 3

What is the name given to the layer of muscles found under the lungs that helps to to move air into and out of the lungs?

CORRECT ANSWER
diaphragm
EDDIE SAYS
The diaphragm is the layer of muscle found under the lungs, which contracts to assist breathing.
  • Question 4

What happens to the ribcage as you breathe in?

CORRECT ANSWER
it expands up and out
EDDIE SAYS
When we breathe in, our ribcages move up and out. This increases the volume inside the ribcage which results in air rushing into the lungs.
  • Question 5

What happens to the diaphragm as you breathe out?

CORRECT ANSWER
it relaxes moving upwards
EDDIE SAYS
As we breathe out, our diaphragms relax, becoming dome shaped. This decreases the volume inside the ribcage, forcing air out of our lungs.
  • Question 6

Match the correct part of the respiratory system with what it does during inhalation. If you can't read all of the words in the boxes, hover your mouse over them.

CORRECT ANSWER

Column A

Column B

trachea
allows air from the mouth and nos...
ribcage
moves out and up
diaphragm
contracts downwards
EDDIE SAYS
The trachea is the windpipe that the air travels down to get to the lungs. The ribcage moves up and out and the diaphragm contracts, becoming flattened, increasing the volume inside the ribcage and causing air to fill the lungs.
  • Question 7

From the diagram below, what is picture A representing? 

 

CORRECT ANSWER
breathing in
EDDIE SAYS
Picture A shows the body inhaling (breathing in). The ribcage moves up and out, the diaphragm contracts and air rushes into the lungs.
  • Question 8

Which of the following occur when you breathe in and out? 

CORRECT ANSWER
 Breathing InBreathing Out
Mouth and nose: Air in
Mouth and nose: Air out
Ribcage: down and in
Ribcage:up and out
Diaphragm: contract downwards
Diaphragm: relax upwards
---- OR ----

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