Life Science, Grade 11. Ventilation of the Lungs.



Ventilation of the lungs is the process by which air is inhaled into and exhaled out of the lungs.

Also known as the first step in the respiration process.


Discuss the differences between cellular respiration, breathing and gas exchange. 0k 0k

1. Gaseous Exchange in the Alveoli
2. Transport Gases around the Body
  • Bloodstream & Tissues
2.1. Oxygen in the Blood
  • Hemoglobin 
  • Factors that affect oxygen binding
  • Figure 2 & 3 (
  • Figure 4 (
2.2. CO2 in the Blood
  • Transported from body tissues to lungs by one of three methods; Dissolution directly into the blood, Binding to hemoglobin, Carried as a bicarbonate ion.

The activity is set up out of three levels op questioning. By making visual connections, learners use pictures or observations to answer questions. Review questions means that learners will have to go back and think more by giving explanations on questions asked. Critical thinking skills must be applied to think outside the box and make relevant connections in order to answer questions.


After the lesson and upon completing the activity, learners will be able to make connections between the ideas and concepts of what they have been learning. And also, be able to understand that school science can be relevant to their lives outside of the school and that it enriches their lives.


1. Cellular Respiration Explained...with Animation & Puppets. 2020, April 28.

2. Gas Exchange in Lungs Physiology Video Animation - MADE EASY. 2014, November 24. 0k 0k

3. Mechanism of Breathing, Animation. 2018, February, 20.

4. Figure 1. Systems of Gas Exchange.

5. Gaseous Exchange in the Alveoli. 2019, October 26.

6. Figure 2 & 3. Red Blood Cells & Hemoglobin.

7. Figure 4. Sickle Cell Anemia.

Teacher Page

By the end of this lesson/section you will be able to do the following:

  • ​​​​​​Decribe the passage of air from the outside environment to the lungs.
  • Explain how lungs are protected from particular matter.
  • Name and describe lung volumes and capacities.
  • Understand how gas pressure influences how gases move into and out of the body.
  • Describe how oxygen is bound to hemoglobin and transported to body tissues.
  • Explain how carbon dioxide is transported from body tissues to the lungs.