1.3 Anatomy of the respiratory system

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

Welcome everyone 

 Think about...

• Take off your coat, hat/cap off.
• Mobile in the phone bag (on silent).
• Book (laptop) + notebook, pen on the table. Bag on the floor.
• Sit in your own place.
• You can eat and drink in the canteen.
• 5 minutes.

schedule 

• What did you rememberd?          5 min
• Respiratory system                         15 min
• 
  
• Doing assignments                        15 min      
• Closing                                                   5 min

Learning goal 

you can...

• You can name parts of the respiratory system with their features and functions.
• You can state the differences between inhaled air and exhaled air.
• You can describe how inhalation and exhalation are achieved.

Parts of the respiratory system

What happens if you choke?

When will the epiglottis close?

1. When you breathe in
2. When you breathe out
3. When you sneeze
4. When you swallow food

What function do the cartilage rings around the windpipe (trachea) have?

Gas exchange

The walls of the lung capillaries and alveoli are extremely thin (1 cell layer).

The surface area (het oppervlakte)  of the alveoli is really big. This means gas exchange can happen at many places. 

Because of the thin walls and the big surface area, gas exchange can happen very fast!

(there are about 300-500 million alveoli's in your lungs)

Gas exchange 

1) Oxygen comes from the air we inhale into the alveoli -> Oxygen goes from alveoli through the wall into the blood of the lung capillary -> blood brings Oxygen to all the cells in the body. 

2) Blood brings Carbon dioxide from cells to the lungs -> Carbon dioxide goes from blood through the walls into the alveoli -> We breath out the Carbon dioxide.

What can be a negative effect of coughing a lot?

Do assignments 1 to 8 on pages 22/23 of the workbook

How many mL of air can your lungs contain?

Chest breathing

Chest breathing

Abdominal breathing

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.