1. Respiratory System

2. Think Pair Share  Describe what happens when you breathe.

3. Functions of the Respiratory System  Taking in oxygen  Eliminating carbon dioxide  Breathing is the movement of air into and out of the lungs.

5. Organs of the Respiratory System  Pharynx – receives air, food, and liquids from nose and mouth  Larynx – Voice Box  Trachea – air tube

6.  Bronchi – 2 narrow branches of the trachea  Lungs – main organs of respiration  Alveoli – air sacs where gas exchange occurs

7.  Diaphragm – large muscle that contract and relaxes to move air in and out of the lungs

8. Respiratory Illnesses  Cold  Flu  Pneumonia  Lung Cancer  Bronchitis  Asthma  Emphysema

9. Think Pair Share  How does the respiratory system maintain homeostasis in the body?

10. Homeostasis  The muscular system interacts with the respiratory system so you can breathe.

11. Learning Scale … I can 4 – Research infectious agents and how they affect the body 3 – Understand the general functions of the body systems and how infectious agents may affect the system. 2 – Recognize or recall key terms: homeostasis, respiratory system, etc. 1 – With help, I know some of 2 and 3