1. 1. What makes active transport different to diffusion?
2. What is the formula for glucose?
3. How does a plant leaf maximise diffusion?
4. How does a plant leaf maximise surface area?
5. Where does photosynthesis take place?
6. Which transport system transports sugar?
7. Where is glucose made in a plant?
8. What conditions increase transpiration rates?
9. Which transport mechanism results in movement of water from the soil
into the roots?
10. What starts the process off transpiration in a plant?
2. Why is diffusion important to life?
Oxygen, food and waste products are some of the
substances that move by diffusion.
In animals, how do these vital substances get to where they
are needed?
The substances are
transported in the
bloodstream, from where
they can diffuse in and
out of cells.
3. Where does gas exchange occur in
the following organisms?
4.
5.
6.
7.
8.
9. Structure of lungs and exchange
Lesson objectives
• All will know how the structure of the lungs
• Most will be able to explain the adaptations of
the lungs
• Some will be able to evaluate the importance
of the adaptations of the lungs
10. What is breathing?
The breathing system is used by the body to
get the oxygen needed for respiration.
It is also use to get rid of the waste product of
respiration, the gas carbon dioxide.
Breathing in and breathing out are separate
processes in the body:
Breathing in is also known as inhalation.
Breathing out is also known as exhalation.
11. Structure of the lungs and exchange
• Label the diagram of the chest and lungs
Key words:
Lung
Trachea
ribs
Intercostal muscles
Diaphragm
Bronchi
Bronchioles
12. Lungs and bronchi
Each Bronchus connects the trachea to a large air sac
known as a lung.
trachea
right bronchi left bronchi
right lung left lung
13.
14. Draw the route that O2 and CO2 gas takes
Down the trachea
Through each Always remember
bronchus that the CO2 is moving
in the opposite
direction!
And through all the
bronchioles within
each lung
Gas exchange takes
place at the alveoli
