1. DO NOW Date: 11/23 Reminders Describe the difference in the two lungs below. What might cause the differences that you observed?

2. ESSENTIAL QUESTION: How do the structures and functions of the respiratory system provide oxygen to the body? OBJECTIVES: Explore the structures and functions of the respiratory system.

3. Teacher Demo: Breathing & Bromothymol Blue BROMOTHYMOL BLUE: What are you breathing out? When the teacher exhales into the Bromothymol Blue, then ______________________________ (what will happen?) READ THE PARAGRAPH on Bromothymol blue. 1) What happened when the teacher breathed out into the bromothymol blue? 2) Why do we inhale? 3) Why do we exhale? What proof do you have?

4. Respiratory System BrainPop: Respiratory System

5. Respiratory System (Lung Model Handout) The function of the respiratory system is to provide oxygen to your body cells and remove carbon dioxide. O2O2 CO 2

6. Lung Model Write the name of the system that we are exploring. Describe your observations as you pull down on the balloon. What do you see?

7. Respiratory System Reading Tape this reading on to page ____ Underline the body system Put boxes around the structures of the system Label these structures on the picture

8. DO NOW Date: 11/24 Reminders: Describe the structures (parts or organs) and function (the job) of the respiratory system.

9. ESSENTIAL QUESTION: How do the structures and functions of the respiratory system provide oxygen to the body? OBJECTIVES: Explore the structures and functions of the respiratory system. Understand the pathway of air flow in the lungs.

10. The Respiratory System The Incredible Human MachineThe Incredible Human Machine (6:30-8:30)

11. The Pathway of Air Foldable

14. 1. Nasal Cavity (or oral cavity) Air enters the body through the nostrils (your nose) most of the time It is lined with a ciliated mucus membrane which filters, warms, and moistens the air

15. 3. Trachea The main airway in the human respiratory system. It contains rings of a tough tissue (cartilage) which keep the trachea open.

16. 4. Bronchi Two tubes that branch off the trachea. The bronchi are ringed with cartilage. Each bronchus extends to the lungs where the tubes become smaller. Bronchi is plural. Both bronchi Bronchus is singular. One bronchus.

17. 5. Bronchioles Smaller and smaller passageways that extend from each bronchus. The bronchioles are found in the lungs and not ringed with cartilage.

19. 6. Alveoli The lungs are made of about 300 million of these tiny air sacs. When you breathe in air fills the alveoli. Oxygen leaves the alveoli, enters the red blood cells and is returned to the heart to be pumped to all your body cells. Carbon dioxide is exhaled when you breathe out.

20. Gas Exchange in the Alveoli

21. ELABORATE: USE YOUR FOLDABLE TO FILL IN THE LABELS OF YOUR LUNG MODEL SHEET:

22. EXIT TICKET 1)What are the major structures of the respiratory system? 2)What is the function of the respiratory system?