Lesson 3: Breathing and gas exchange

Chapter 5 (kerboodle) 
Breathing and respiration
Lesson 3: Breathing and gas exchange (p.69-70)
1 / 10
volgende
Slide 1: Tekstslide
BiologieMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 10 slides, met tekstslides en 1 video.

time-iconLesduur is: 45 min

Onderdelen in deze les

Chapter 5 (kerboodle) 
Breathing and respiration
Lesson 3: Breathing and gas exchange (p.69-70)

Slide 1 - Tekstslide

Discussion of hw
Page 45

Slide 2 - Tekstslide

Slide 3 - Video

Breathing in 
-Intercostal muscles - contract
-Diaphragm muscles -  contract
-Increases volume of thorax
- Pressure thorax decreases
- External air pressure is greater
  air moves inside

Slide 4 - Tekstslide

Breathing out
-Intercostal muscles - relax
-Diaphragm muscles - relax
-Decrease volume of thorax
- Pressure thorax increases
- Internal pressure is greater
   air forced out

Slide 5 - Tekstslide

Lung structure
-Trachea 
-Bronchus
-Bronchioles
-Alveoli

Slide 6 - Tekstslide

Gas exchange
-Oxygen diffuses into the water lining
  It diffuses through to the blood

-Carbon doixide diffuses into the lungs

-Blood transports oxygen and 
  carbon dioxide

Slide 7 - Tekstslide

Lung volume
Adult -> 5 liters of air (deepest breath)
At rest -> 0.5 liter is used
During excersize -> 3 extra liters can be taken in

Tidal volume = volume you breath out while you are resting
Vital capacity = the most air you can breath out

Slide 8 - Tekstslide

Breathing and excersize

Slide 9 - Tekstslide

HW for next lesson 
-3 Worksheets on classroom

Slide 10 - Tekstslide