Respiratory+System+WB

(1) What is the purpose of the respiratory system? (2) Describe the path of air from the nose to the lungs. (3) Which organs are part of the upper respiratory tract and what is the function of each organ? (4) Several organs have connections with the pharynx. What are they? (5) What two pathways cross in the pharynx? Why is it correct to say they cross? (6) What organs are part of the lower respiratory tract? What are the the functions of each organ? (7) Which organ of the respiratory tract functions in gas exchange? (8) What are some common infections and disorders of the upper respiratory tract? (9) What are some common infections and disorders of the lower respiratory tract? (10) What are the three respiratory disorders commonly associated with smoking tobacco?

1. The purpose of the respiratory system is to bring oxygen into the body, as well as to remove carbon dioxide.

2. Air travels through the nose and lungs. Air is introduced into the body through the nasal cavity. Air then travels through the pharynx, then to the glottis. Air then travels to the larynx, then the trachea, and then to the lungs.

3. The nasal cavity is where air is brought into the body. When a person inhales, air comes from outside the body, into the body, from this passage. The pharynx simply connects the larynx to the nasal cavity. The larynx connects the the pharynx to the trachea.

4. The pharynx is connected to the larynx, nasal cavity, and trachea.

5. Food and air passages cross in the pharynx. The larynx and esophagus cross, but also work together to keep food from entering air passages, and vice-versa.

6. The trachea is part of the lower respirator tract, and leads to the bronchi. The bronchi are covered in bronchioles, and help to produce oxygen. The lungs store oxygen for the body, and remove CO2 from the body.

7. The alveoli is responsible for gas exchange.

8. Sinusitis, tonsillitis, and laryngitis are common illnesses associated with the upper respiratory tract.

9. Bronchitis and Pneumonia are common illnesses of the lower respirator system.

10. The dangers of smoking are lung cancer, chronic bronchitis, and emphysema.