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WorksheetsIGCSE P.E.: Ch. 2.1: Pathway of air and Gaseous Exchange
Total questions: 11
Worksheet time: 6mins
Complete the following pathway of air into the body: (Suggest two)
1. Mouth
2. Trachea
3.
4.
5. Alveoli
Alveolus
Bronchi
Bronchioles
Windpipe
State the order of the pathway of air into the body.
Mouth/nose. Bronchi. Bronchioles. Alveoli. Trachea
Mouth/nose. Trachea. Bronchioles. Bronchi. Alveoli
Mouth/nose. Trachea. Bronchi. Bronchioles. Alveoli
Mouth/nose. Trachea. Alveoli. Bronchi. Bronchioles.
Where does the Gaseous exchange take place?
Trachea
Bronchi
Bronchioles
Alveoli
Suggest four characteristics of the Alveoli.
One cell thick, allowing for diffusion to occur easily
Surrounded by capillaries, which allows good blood supply
Contains elastic fibres, allowing for an increase in surface area during inspiration
Are small in size allowing for a large surface area for diffusion to take place
Is located in the diaphragm
Complete the following pathway of air into the body:
1. Mouth
2. Trachea
3.
4.
5. Alveoli
[2]
One of the characteristics of the Alveoli is that they are surrounded by capillaries. Suggest an explanation for this.
this allows a good blood supply which ensures that oxygen can be transferred into the blood and carbon dioxide removed.
due to the thinness of the walls, diffusion of oxygen and carbon dioxide through alveoli is easy.
this allows the alveoli to increase in surface area during inhalation.
One of the characteristics of the Alveoli is that the walls of the alveoli contain elastic fibres. Suggest an explanation for this.
this allows a good blood supply which ensures that oxygen can be transferred into the blood and carbon dioxide removed.
due to the thinness of the walls, diffusion of oxygen and carbon dioxide through alveoli is easy.
this allows the alveoli to increase in surface area during inhalation.
One of the characteristics of the Alveoli is that they are One Cell thick. Suggest an explanation for this.
this allows a good blood supply which ensures that oxygen can be transferred into the blood and carbon dioxide removed.
due to the thinness of the walls, diffusion of oxygen and carbon dioxide through alveoli is easy.
this allows the alveoli to increase in surface area during inhalation.
One of the characteristics of the Alveoli is that the walls of the alveoli are moist. Suggest an explanation for this.
allows diffusion through the cell walls;
the size and high number of alveoli allow for a large surface area for diffusion to take place;
One of the characteristics of the Alveoli is that the alveoli are small in size. Suggest an explanation for this.
allows diffusion through the cell walls;
the size and high number of alveoli allow for a large surface area for diffusion to take place;
(b) Name two characteristics of the alveoli. Explain how each characteristic enables gaseous exchange to occur.
characteristic 1
Explanation
Characteristic 2
Explanation
[4]
