Biology Unit 1: Breathing and respiration chapter 1.1, 1.2, 1.3

Recap unit 1: Breathing and respiration part 1
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This lesson contains 39 slides, with interactive quizzes, text slides and 2 videos.

time-iconLesson duration is: 40 min

Items in this lesson

Recap unit 1: Breathing and respiration part 1

Slide 1 - Slide

What are you going to do today?
In this lessonUp you are going to repeat and practice chapter 1.1, 1.2 and 1.3 partly.

Make it seriously and make it by yourself. This is to help you learn and see how much you know about the chapters mentioned above. This will also show me what parts I have to focus on more in class!


Slide 2 - Slide

at the end of this lessonUp you can:
* name the functions of the respiratory system

* describe combustion and respiration including the terms fuel, oxygen, water, carbon dioxide and energy

explain what an indicator is

* describe the differences in oxygen and carbon dioxides levels in inhaled and exhaled air.

* describe respiration in organisms and explain the relationship with physical activity using the terms glucose, oxygen, water, carbon dioxide, energy 

Slide 3 - Slide

Why is the respiratory system important?
Your respiratory system is the network of organs and tissues that help you breathe. 

This system helps your body absorb oxygen from the air to create energy for our body.

It also cleans waste gases from your blood and protects you from things that can irritate you body. 

It also helps us smell and make sound. 

Slide 4 - Slide

1.1 Combustion is similar to respiration
But what is combustion?

What does it do?

and what does it have to do with our respiratory system?

Important words are in red!

Slide 5 - Slide

Combustion is another name for burning.

In a combustion reaction, a fuel is burned and it reacts with oxygen (gas) to release energy.

Take for example the candle. 
The wax is the fuel. Burning the fuel (you need Oxygen for this) creates energy which is released in the form of heat and light.

Slide 6 - Slide

When the fuel is burned, it disappears and other substances appear in its place. 

The substances produced by combustion are called combustion products. Sometimes also referred to as waste products (afvalstoffen).

Look at the candle again. You can see two black arrows going away from the flame. The arrows stand for the combustion products, in this case: Carbon dioxide (gas) + steam (water).

Slide 7 - Slide

Slide 8 - Video

The fire triangle summarises the three things needed for combustion - a fuel, heat and oxygen. If one of these things is removed from a fire, the fire goes out.

Slide 9 - Slide

1) What does combustion mean?
2) What does it do?
1) Burning, 2) create energy
1) Burning, 2) create Oxygen
1)Heat, 2) create energy
1) Energy, 2) create Carbon dioxide

Slide 10 - Quiz

Make the formula of combustion in the candle.
Carbon Dioxide

Slide 11 - Drag question

Explain what combustion products are

Slide 12 - Open question

What are the combustion products of the combustion of a candle?
Carbon dioxide and Oxygen
Oxygen and steam
Steam and Carbon dioxide
Carbon dioxide and energy

Slide 13 - Quiz

What is an indicator?
Well now you know that Carbon dioxide is a gas that is present in the air. 
It is also present in the bubbles of carbonated drinks (hence the name).

There is a way to show if Carbon dioxide is present.  Remember? We used lime water (kalkwater) and straws to do that. 

A substance that can be used to demonstrate the presence of another is called an indicator.

Slide 14 - Slide

Soooo... what exactly does this have to do with our respiratory system?
At this point you know:
  • What combustion is and how it creates energy,
  • What combustion products are,
  • What an indicator is.
(if you at this point do know know any of the above, 
read the slides again!)

The next slides will show you how combustion and our 
respiratory system are connected!

Slide 15 - Slide

A kind of combustion also happens in your body. The combustion in your body goes much slower than in a candle and it does not use fire. 

This combustion - called respiration - takes place in every single cell in your body. 
This goes on day and night, it never stops. Without respiration a cell dies.

Respiration happens in every living cell in every living organism.

Slide 16 - Slide

Our body uses a lot of energy to:
  •  Keep our body temperature at 37 degrees, 
  •  to move, 
  •  to grow, 
  •  to keep our organs working etc. 

Respiration creates the energy we need to do the above. 

Slide 17 - Slide

How does respiration work?
Respiration needs fuel.
The most commonly used fuel is glucose. This is a sugar. 

You have learned that plants make glucose and Oxygen by photosynthesis.
Humans and other animals eat those plants. That is how we get the glucose in our bodies and we take the Oxygen from the air. 

Slide 18 - Slide

Make the formula of Photosynthesis
Carbon Dioxide

Slide 19 - Drag question

What happens during respiration?
Respiration can happen when we have Glucose (fuel)
and Oxygen. 

When breath out, you are getting rid of Carbon dioxide. 
You also lose some water when you exhale.
--> waste products.

Respiration produces the energy we need.

Cell respiration
Carbon dioxide


Slide 20 - Slide

Slide 21 - Video

Respiration during exercise
During exercise there is an increase in physical activity and muscle cells respire more than they do when the body is at rest.

The heart rate increases during exercise. The rate and depth of breathing increases - this makes sure that more oxygen is absorbed into the blood, and more carbon dioxide is removed from it.

Slide 22 - Slide

Make the right formula of respiration
Carbon Dioxide

Slide 23 - Drag question

What are the waste products of respiration
Carbon Dioxide + Oxygen
Oxygen + Water
Water + Energy
Carbon Dioxide + water

Slide 24 - Quiz

What is the fuel for respiration?
Carbon Dioxide

Slide 25 - Quiz

Respiration only happens in humans
Not true

Slide 26 - Quiz

Respiration only happens during the day
Not true

Slide 27 - Quiz

Without respiration we would die
Not true

Slide 28 - Quiz

respiration and breathing are the same thing?
Not true

Slide 29 - Quiz

What is the difference between breathing and respiration?

Slide 30 - Open question

describe respiration in organisms and explain the relationship with physical activity using the terms glucose, oxygen, water, carbon dioxide, energy

Slide 31 - Open question

Explain why it is important that we breath

Slide 32 - Open question

The composition of the air we breath
Air is a mixture of several gasses but it consists mainly of Nitrogen (stikstof) and Oxygen. 

Air always contains a bit of water vapor, although the amount of water varies. The composition is therefor often stated for dry air.

Slide 33 - Slide

Difference in air composition while breathing in and out
Inhaled air contains:
  • more oxygen used to create energy.
  • less carbon dioxide than exhaled air.

Exhaled air contains:
  • more carbon dioxide produced as a waste product of energy production.
  • less oxygen as it has been used in respiration.

% in inhaled air
% in exhaled air
Carbon Dioxide

Slide 34 - Slide

short summary...
Respiration is a form of combustion that happens in our cells. 
Respiration creates energy. 

Our cells need Oxygen and Glucose for respiration to happen. 
Oxygen we take from the air. 
Glucose we get from eating plants. 

The waste products are: Carbon dioxide and water

Slide 35 - Slide

How is the composition of air different between air you breath in and breath out? and why is it different?

Slide 36 - Open question

Was this LessonUp useful?
A little bit

Slide 37 - Poll

Do you feel like you understand combustion and respiration better?
A little bit

Slide 38 - Poll

Well done!
When done: 
1) Write down the topics you want me to repeat in class.

2) Make list with all the difficult names and concepts and write down what they mean (begrippenlijst).

Slide 39 - Slide