B5 U1 2HVTTO

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

B5 Healthy airways

• Take off your jacket
• Put your things on your desk

       Book, notebook, pencil case

• Bag on the floor
  
• Read 1.5 

Lessongoals

• You can explain what you can do for yourself to keep your airways healthy
• You can describe what hay fever is

When your ribs move up you ..

1. breathe in
2. breathe out
3. nothing happens

When your diaphragm moves up you ..

1. breathe in
2. breathe out
3. nothing happens

gas is exchanged in the alveoli.
What gas enters the blood in the alveoli?

1. Only oxygen
2. Only carbon dioxide
3. Oxygen and nitrogen
4. Carbon dioxide and nitrogen

Blood flows to and from the alveoli.
What is typical of blood flowing TOWARDS the alveoli?

1. Contains a lot of oxygen
2. Contains a lot of carbon dioxide
3. Contains a lot of oxygen and carbon dioxide
4. Contains low amounts of oxygen and carbon dioxide

Mark drinks a glass of coke. What happens to his epiglottis and uvula?

1. Both are open
2. Both are closed
3. Uvula is open and epiglottis is closed
4. Uvula is closed and epiglottis is open

Substances in cigarette smoke

• Nicotine

Gets you addicted

• Tar

Cilia don't work as good

Smokers cough

Cancer

• Carbon dioxide (CO₂)

• Carbon mono-oxide (CO)
  

Poisonous and odourless

replaces O₂

Deadly

• Dust particles

Damaging

Ventilation

• Adds oxygen to the air
• Gets rid of excess CO₂ and dangerous gases
• Helps prevent spread of bacteria and viruses

Hay fever

• Allergic to pollen (usually trees, grass)
  
• Burning feeling in nose, throat, eyes

Asthma

Notes

1.  chronic lung disease - will NOT go away

2. muscles of the bronchioles contract - airways become small and difficult to breath

3. Symptom: shortness of breath

COPD

Notes:

1. Chronic inflammation (ontsteking) of the airways

2. Usually caused by smoking

3. Smoke causes mucous lining (slijmvlies) to swell up and produce more mucous

4. Bronchioles and alveoli are also blocked - severe case

Hay fever

Notes:

1. Caused by pollen (stuifmeel) from flowers

2. Pollen sticks to mucous lining

3. Symptoms: burning and itchy nose, throat, eyes

Allergy

Notes

• Allergy: hypersensitive to a particular substance
• Allergic reaction: a reaction to something that you breath or eat
• Examples: dust, animal hairs, makeup, or food