1. There is the Upper respiratory tract and Lower respiratory tract
What organs do you think are in each tract?
Come up and list them.

2. The Respiratory System

3. NOSE PHARYNX LARYNX NASAL CAVITY PARANASAL CAVITIES
UPPER RESPIRATORY SYSTEM
LOWER RESPIRATORY SYSTEM
NOSE
LARYNX
NASAL CAVITY
TRACHEA
PARANASAL CAVITIES
BRONCHI
PHARYNX
LUNGS
ORAL CAVITY

4. THE NOSE / Nasal Cavity
Air enters through two openings, THE EXTERNAL NARES or NOSTRILS

5. The Nasal cavity is made up of:
many bones
cartilage (The tip of your nose)
Sinuses (Pockets between eyes or ears).
The back of the nostrils lead to the pharynx

7. What tissues are in the nasal cavity and what role does it play?
Epithelial Tissue with cilia
Has mucous secreting cells that combined with the cilia help trap dust and move them out of the nose or into the pharynx (throat) which gets swallowed.

8. THE PHARYNX (Throat)
Is a chamber shared by the digestive and respiratory systems.
It begins at the back of the nostrils and extends to the larynx.
What role in the respiratory system does it play? What role in the digestive system does it play?

9. THE PHARYNX

10. Functions of the Pharynx:
A passageway for food traveling from the oral cavity to the esophagus.
A passageway for air passing between the nasal cavity and the larynx.
Helps produce the sounds of speech.

11. If a function of the pharynx is to both let in air and food, how does this process work?
What is happening when “Food goes down the wrong tube?”

12. THE LARYNX JOINS THE PHARYNX WITH THE TRACHEA.
IT IS ALSO CALLED THE VOICE BOX/ ADAMS APPLE
THE EPIGLOTTIS PREVENT INGESTED FOOD FROM ENTERING THE RESPIRATORY TRACT.

13. THE LARYNX

14. THE LARYNX
THE
EPIGLOTTIS

15. THE EPIGLOTTIS

16. THE TRACHEA IS A TUBULAR STRUCTURE LIES IN FRONT OF THE ESOPHAGUS
YOUR WINDPIPE
FILTERS AIR AS IT GOES IN AND OUT.

17. THE TRACHEA

18. BRONCHI
The trachea branch into 2 called the Bronchi (one for each lung).
Each bronchus branches into increasingly smaller passageways
Looks like a tree.

19. Bronchi eventually Branch into: Alveoli
The smallest unit in your respiratory system.
They contain blood vessels (capillaries) which are the site where your oxygen and carbon dioxide is exchanged.
They also have white blood cells to fight bacteria.

20. Alveoli Exchange of Gases:
Oxygen diffuses from aveolar walls and enters the blood.(where it can now go to other cells in the body)
Carbon Dioxide diffuses from the blood through the walls and enters the aveoli. (where it can be exhaled and released)

21. Alveoli Exchange of Gases:
Using the picture below EXPLAIN the gas exchange process:

22. Why do the blood cells start blue and then turn red?

23. THE LUNGS
ARE A PAIR OF CONE SHAPED ORGANS LYNING IN THE PLEURAL CAVITIES.
EACH LUNG IS DIVIDED INTO LOBES
THE RIGHT LUNG HAS 3 LOBES.
THE LEFT LUNG HAS 2 LOBES.
WHICH LUNG IS LARGER?

24. Right Lung / Left Lung

25. What other system is the respiratory closely related to?

26. Vocab Explanation Activity