13.2 Respiration

• Biologie
• Middelbare school
• vmbo t, mavo, havo
• Leerjaar 2

Planning

- Welcome!

- Learning goals
- Breathing insects (+ quiz questions)
- Fish breathing (+ quiz questions)
- Work independently
- To block

This chapter

ST CH13

BT CH13 +CH14 in testweek

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Are you logged in?
Turn your laptop around!
 (the screen is then facing the board).

13.2 Respiration (part 1)

You will learn how insects, fish, and plants breathe.

Where are a wasp's respiratory organs located?

1. Head
2. Thorax
3. Whole body

Red blood cells release ?

? attaches to red blood cells

We call this ? in the lungs

Oxygen rich blood is being transported to all of the ?

Carbon dioxide leaves  the body through the ?

Oxygen

Lungs

Carbon dioxide

Body parts

Gas exchange

What other forms of breathing are there besides the lungs?

What is the respiratory (breathing) system of an insect called?

1. lung
2. gill
3. tracheae
4. stomach

Insects

Tracheae= breathing tubes within an insect. 

• Spiracles = holes on the sides of an insect’s body where air enters and leaves

Breathing

Oxygen enters the trachea and carbon dioxide leaves the trachea as the abdomen becomes larger and smaller.

(e

Spiracles enlarged

Diffusion

Diffusion

substances flow from an area of high concentration to an area of low concentration, until an equilibrium is reached

Oxygen passes from the air in a trachea to the cytoplasm of a cell by diffusion.

Carbon dioxide in insect cells enters the trachea by diffusion

Trachea are:

1. respiratory vessels
2. tubes with air
3. vessels with air
4. holes

How do fish breathe?

1. with tracheae
2. with lungs
3. with gills
4. they don't

Fish

Gills = breathing organs of fish

• Gill arch
• Gill filament
• Lamellae = thin filaments containing capillaries 

Oxygen goes to the blood in the gill lamellae.

Carbon dioxide goes to the water that flows along the gill lamellae.

Countercurrent exchange system

exchange of substances between two flowing liquids or gases, such as oxygen and carbon dioxide, flowing in opposite directions to each other

What?	Make: 13.2 assignment 2-11
How?	In your (online) book. You may whisper with your neighbour.
Help?	Ask your neighbour. Still need help? Raise your hand.
Time?	15 minutes
Finished?	Check your answers with teams!
Yield	Well done! No homework left. You are now allowed to read or work on another subject.

Planning

- Welcome!

- Learning goals
- Instruction
- Work independently
- To block

This chapter

ST CH13

BT CH13 +CH14 in testweek

Log in to LessonUp!
Are you logged in?
Turn your laptop around!
 (the screen is then facing the board).

13.2 Respiration (part 2)

You will learn how plants breathe

You can explain that some single-celled organisms can live without oxygen (deeper).

Quiz

Max 30 sec per question

A wasp often makes movements with its abdomen, why does it make these movements.

1. Because he has too much energy
2. That's how he keeps his enemies at bay
3. He feels itchy
4. To breathe

In this animal, gas exchange takes place via the gills.

1. True
2. False

Carbon dioxide+ water (+energy) -> glucose + oxygen

This is the formula of..

1. Respiration
2. Photosynthesis

What gas is needed for respiration?

In this animal (dolphin species), gas exchange takes place via the gills

1. True
2. False

In which part of the gills does the countercurrent principle take place?

1. Gill arch
2. Gill cover
3. Lamellae
4. None of these answers are correct

Diffusion

 Plants

Gas exchange takes place due to diffusion.

Stomata = small openings in the leaf through which gases can pass.

During the day (photosynthesis + respiration)

Oxygen concentration in the leaf is higher than the surrounding air.

Oxygen goes out.

Concentration of carbon dioxide in the leaf lower than the surrounding air.

Carbon dioxide goes in.

At night (respiration)

No oxygen is produced.

Stomata are closed.

Plant uses oxygen between the cells.

+

+

-->

Fotosynthese:

+

.........

........

.........

..........

........

Do all organisms need oxygen?

Intestinal flora = bacteria that feed on undigested nutrients in your large intestine

Decomposing bacteria = bacteria that feed on dead remains in oxygen-poor circumstances, produce methane gas and other, smelly gases

Do all organisms need oxygen?

Yeasts = single-celled fungi that can survive in environments with or without oxygen.

• oxygen: glucose --> energy
• no oxygen: glucose --> alcohol + carbon dioxide (alcoholic fermentation)

lactic acid bacteria = bacteria that can survive in environments with or without oxygen. 

Oxygen:  glucose --> energy

No oxygen:  glucose --> energy + lactic acid (lactic fermentation)

What?	Make: 5, 7, 9-11, 13-19
How?	In your book. You are allowed to whisper.
Help?	Discuss with your neighbour of raise your hand.
Time?	15 minutes
Finished?	Check your answers!

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