The Respiratory System

Question 1

What is the respiratory system?

Answer 1

Organs and tissues that help your body to exchange gases through the air and the blood

Question 2

How much of the air is made up of oxygen?

Answer 2

21%

Question 3

What goes into the lungs and what comes out of the lungs when breathing?

Answer 3

Oxygen goes into the lungs
Carbon dioxide out (waste product)

Question 4

What gases are involved in gas exchange and where does it happen?

Answer 4

Carbon dioxide and oxygen
Lungs and alveoli

Question 5

What are all the organs involved in the respiratory system?

Answer 5

• Lungs
• Bronchus
• Nose
• Alveoli
• Diaphram
• Trachea
• Bronchiole

Question 6

What are some adaptations of alveoli?

Answer 6

1. Moist walls - gases dissolve in the moisture helping them to pass across the surface
2. Thin/permeable walls - allow gases to cross easily
3. Extensive blood supply - ensures oxygen-rich blood is taken away from the lungs and carbon dioxide-rich
   blood is taken to the lungs
4. Provide a large surface area - more gases can be exchanged at a greater rate