1.3 - the respiratory system

The respiratory system
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BiologieMiddelbare schoolvwoLeerjaar 2

This lesson contains 36 slides, with interactive quizzes, text slides and 2 videos.

time-iconLesson duration is: 40 min

Items in this lesson

The respiratory system

Slide 1 - Slide

Short summary 
Respiration is a form of combustion (verbranding) 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.

The waste products (combustion products) are: Carbon dioxide and water

Slide 2 - Slide

Cells respire more during exercise, because you need more energy.

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


Slide 3 - Slide

The parts of the respiratory system and their functions

Slide 4 - Slide

The nasal cavity and oral cavity
When you breath the air comes in through the  nasal cavity or oral cavity.

The nasal cavity is a large, air-filled space above and behind the nose in the middle of the face. 

In the front part of the nasal cavity are the nasal hairs, they trap larger dust particles. 



Slide 5 - Slide

Check out the picture for all the parts!
The walls of the nasal cavity are covered with the nasal lining, which has mucus-producing cells (cells that produce mucus, slijm).
--> This is also called the mucous membrane.

The mucus moistens the air that you inhale. 

Under the nasal lining are a lot of small blood vessels that keep the nasal lining warm. This also warms up the inhaled air. 

Slide 6 - Slide

So the nasal hairs capture the big dust particles. 
Smaller dust particles and germs stick to the mucus of the nasal lining. 

Small hairs called cilia sweep the mucus towards the back where it gets swallowed.
(you will see this in the video on the next page).

Slide 7 - Slide

Slide 8 - Video

The olfactory system
The air we inhale gets checked by the olfactory system. This helps you smell and it warns you if it contains any smelly gasses that may be dangerous.

  • The olfactory system is located in the roof of the nasal cavity

    Slide 9 - Slide

    Which one holds onto the smaller dust particles you inhale?
    A
    Olfactory sytem
    B
    Mucus
    C
    Nose hairs
    D
    Ciliated cells

    Slide 10 - Quiz

    What is the olfactory system used for?
    A
    The exchange of gas
    B
    Clearing the nasal cavity of dust particles
    C
    Used for the sense of smell
    D
    Clearing the bronchiole of dust particles.

    Slide 11 - Quiz

    What is the function of cilia?
    A
    Sweep dust particles and other irritants to the back of the nasal cavity
    B
    Sweep snot to the back of your nasal cavity
    C
    Make mucus to catch dust particles
    D
    Sweep dust particles to the front of your nose

    Slide 12 - Quiz

    Oral cavity
    When you breath through your mouth the air is not cleaned, warmed or moistened as much. Your sense of smell is less good then too. 

    Breathing through your nose is healthier than breathing through your mouth. 

    Slide 13 - Slide

    Name 4 short reasons why breathing through your nose is healthier than breathing through your mouth

    Slide 14 - Open question

    Pharynx 
    After the nasal cavity and oral cavity air passes the pharynx.

    The pharyx is where the path taken by your food crosses the path taken by the air you breath.






    Slide 15 - Slide

    Breathing
    1. When you breath the uvula and epiglottis are open. This way air can go straight into the windpipe. 

    Slide 16 - Slide

    Swallowing
    2. When you swallow the uvula and epiglottis are closed. This way food can not get into the nasal cavity or windpipe. 

    Slide 17 - Slide

    Choking
    3. When you choke the uvula and epiglottis did not close properly and food gets into your windpipe. 

    Most of the time you can cough (hoesten) the food back up.

    Slide 18 - Slide

    Slide 19 - Video

    Open
    Closed
    open
    closed
    open
    closed
    uvula
    epiglottis
    uvula
    epiglottis
    uvula
    epiglottis

    Slide 20 - Drag question

    Larynx 
    The larynx or voicebox is located between the pharynx and windpipe. The larynx contains the vocal cords (stembanden).

    You can feel the larynx on the outside of your throat as the Adam's apple. 

    Slide 21 - Slide

    Windpipe
    The windpipe or trachea is a hollow tube connected to the lower part of the larynx. 

    The wall of the windpipe has horse-shoe shaped rings, called the cartilage rings (kraakbeen ringen). They make sure the windpipe is always open and doesn't collapse. 

    The cartilage rings don't fully close in the back, this is for flexibility. 


    Slide 22 - Slide

    Bronchi 
    The windpipe splits into two branches called the bronchi, one to each lung. 

    The bronchi also have cartilage rings in the wall. 

    The bronchi split into even smaller branches called the bronchioles. 

    The bronchioles are too small for cartilage rings, they have small muscles in the walls. 

    Slide 23 - Slide

    The larynx contains the ...?
    A
    Vocal cords
    B
    Windpipe
    C
    Cartilage rings
    D
    Adam's apple

    Slide 24 - Quiz

    Why are the cartilage rings horse-shoe shaped?
    A
    For breathing
    B
    For flexibility
    C
    for respiration
    D
    to make it stronger

    Slide 25 - Quiz

    Oral cavity
    Pharynx
    Larynx
    Alveoili
    Bronchiole
    Bronchi
    Windpipe
    Nasal cavity

    Slide 26 - Drag question

    Put the organs in the correct order
    Air enters the body
    Gas exchange
    Nasal cavity
    Alveoli
    Pharynx
    Larynx
    Bronchi
    Bronchioles
    Trachea

    Slide 27 - Drag question


    Blood with a lot of Oxygen
    Blood with Carbon dioxide 
    one cell layer thick
    lung cappilaries around the alveoli

    oxygen goes into the red blood cells

    Carbon dioxide goes into the air

    Slide 28 - Drag question

    What is the main purpose of the alveoli?
    A
    Transfer oxygen to and remove CO2 from the blood cells
    B
    To trap dust in the lungs
    C
    To make your voice go high When inhaling helium.
    D
    To transfer blood.

    Slide 29 - Quiz

    how thin are the walls of the alveoli?
    A
    1 mm
    B
    1 cell
    C
    the same as a nose hair
    D
    10 cells

    Slide 30 - Quiz

    Blood that comes from the lungs is ..
    A
    Oxygen rich and Carbon dioxide poor
    B
    Oxygen rich and Carbon dioxide rich
    C
    Oxygen poor and Carbon dioxide rich
    D
    Oxygen poor and Carbon dioxide poor

    Slide 31 - Quiz

    Blood that comes from the cells is...
    A
    Oxygen rich and carbon dioxide poor
    B
    Oxygen rich and Carbon dioxide rich
    C
    Oxygen poor and Carbon dioxide rich
    D
    Oxygen poor and Carbon dioxide poor

    Slide 32 - Quiz

    Explain how gas exchange takes place inside the alveoli using the terms oxygen, lung capillaries, carbon dioxide

    Slide 33 - Open question

    Explain in which 2 ways the form of the alveoli contributes to rapid gas exchange.

    Slide 34 - Open question

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    Slide 35 - Poll

    Write down questions or topics you want me to answer or spend more time on in class

    Slide 36 - Open question