1. Life Science Unit Overview: Chapter 1 – Structure of Living Things
Lesson 1 – Cells
Lesson 2 – From Cells to Organisms
Lesson 3 – Diversity of Organisms
Chapter 2 – Plant Structures and Functions
Lesson 1 – Vascular Plants
Lesson 2 – Plant Transport Systems
Lesson 3 – Photosynthesis and Respiration
Chapter 3 – Human Body Systems
Lesson 1 – The Human Body
Lesson 2 – The Digestive System
Lesson 3 The Respiratory System
Lesson 4 – The Circulatory System
Lesson 5 – The Excretory System

2. The Respiratory System
Lesson Overview:
1) What do we already know? (The Human Body)
2) Vocabulary
3) Drawings
4) Main Ideas
5) Review
Human Body Systems: Lesson 3

3. The Respiratory System: What do we already know? BrainPOP Teaser
Page 1
The Respiratory System: What do we already know? BrainPOP Teaser
What is digestion? a)
Where does digestion begin?
How is food broken down further?
3) Food Chain
Human Body Systems: Lesson 3

4. The Respiratory System: Vocabulary Part I
Page 2
The Respiratory System: Vocabulary Part I
1) inhale: to breathe air into your body through your mouth or nose.
2) lungs: organs that fill with air when you inhale and empty of air when you exhale.
3) exhale: to breathe out.
4) diaphragm: is the muscle located below your lungs that contracts and expands to control your breathing.
Human Body Systems: Lesson 3

5. The Respiratory System: Vocabulary Part II
Page 3
The Respiratory System: Vocabulary Part II
5) bronchi: are the branches of tubes that get smaller and smaller
6) capillary: is a tiny blood vessel.
7) alveoli: are very thin air sacs at the end of the bronchi tubes that aids in the exchange of oxygen and carbon dioxide.
8) diffusion: is the movement of particles from areas of high concentration to low.
Human Body Systems: Lesson 3

6. The Respiratory System: Drawings (pg. 135)
Page 4
Human Body Systems: Lesson 3

7. The Respiratory System: Drawings (pg. 136)
Page 5
Human Body Systems: Lesson 3

8. The Respiratory System: Drawings (pg. 138)
Page 6
Human Body Systems: Lesson 3

9. The Respiratory System: Main Ideas
Page 7
The Respiratory System: Main Ideas
What does the respiratory system do? (pg )
a) It transports the air you breathe and exchanges oxygen and carbon dioxide between your blood and your tissues.
Quick Check (pg. 135)
-Critical Thinking: Explain how the
diaphragm and lungs work together?
a) The diaphragm helps the lungs contract and expand which allowing the lungs to take in and push out air.
Human Body Systems: Lesson 3

10. The Respiratory System: Main Ideas
Page 8
The Respiratory System: Main Ideas
2) Where does gas exchange take
place? (pg )
a) The alveoli.
Quick Check (pg. 137)
-Critical Thinking: Carbon dioxide is a human
waste. Is this true for plant, too?
a) No. Oxygen is a plant waste.
Human Body Systems: Lesson 3

11. The Respiratory System: Review
Page 10
The Respiratory System: Review
Summarize the main ideas
Click to Watch!
Think, Talk, and Write
Human Body Systems: Lesson 3