1. Chapter 17 Respiratory and Excretion Systems

2. Section 1 Respiratory System Functions – The respiratory systems moves oxygen from the outside environment into the body. It also removes carbon dioxide and water from the body – Taking Oxygen Respiration – Removing Carbon Dioxide and Water – Systems Working Together

3. Section 1 The Path of Air – As air travels from the outside environment to the lungs, it passes through the following structures: nose, pharynx, trachea, and bronchi – The Nose Cilia – The Pharynx or the throat What is the role of the cilia?

4. Section 1 The Path of Air – Trachea or windpipe – The Bronchi and Lungs Bronchi Lungs Alveoli – How is food prevented from entering the trachea?

5. Section 1 Gas Exchange – After air enters an alveolus, oxygen passes through the wall of the alveolus and then through the capillary wall into the blood. Carbon dioxide and water pass from the blood into the alveoli. This whole process is known as gas exchange. – How Gas Exchange Occurs – Surface Area for Gas Exchange – What gases are exchanged across the alveoli?

6. Section 1 How You Breathe – Muscles for Breathing Diaphragm – The Process of Breathing When you breathe, the actions of your rib muscles and diaphragm expand or contract your chest. As a result, air flows in or out – What muscles cause the chest to expand during breathing?

7. Section 1 How You Breathe – Relating Breathing and Speaking Larynx Vocal cords