Breathe+In+Breath+Out+JO

Respiratory System (Chapter 9) Nasal cavity: filters, warms, and moistens air. They are narrow canals separated from each other by the septum, which is composed of bone and cartilage. Hairs line the nasal cavities. They act like filters for the nose. The cavity also produces mucus-like fluid that traps unwanted particles and moves it to the pharynx. Pharynx: A passage where food and air cross. Its funnel in shape and connects the nasal and oral cavities to the larynx. Also known as “throat.” Tonsils are the final defense before entering the throat. Glottis: Space between the vocal chords; opening to the larynx. When air is expelled from the glottis the vocal chords vibrate causing sound. Sound and pitch are changed with tension in the vocal chords. Larynx: is the “voice box” it produces sound. It is a cartilaginous structure that serves as a passageway for air between the pharynx and the trachea. (Said to be triangular) it is a house to the vocal chords. Trachea: (windpipe): passage of air to bronchi. Bronchus: passage of air to lungs. Bronchioles: passage of air to alveoli. Lung: contains alveoli (air sacs); carries out gas exchange. Diaphragm: Skeletal muscle; functions in ventilation.

Part 2. Describe the structure and function of alveoli in great detail. (Inserting a picture of an alveolus would be nice.)

Part 3. (p. 178) Describe in great detail how Carbon Dioxide is carried in the blood and how Oxygen is carried in the blood.

Part 4. Describe 4 respiratory disorders of your choice (in great detail)