Tables/Diagrams Review Organ/Part Function Nose Primary entrance of air; hairs filter incoming air Nasal cavity Filters, warms, and moistens incoming air Paranasal sinuses Reduce weight of head; resonant chambers Pharynx Passageway for air and food Larynx Air passageway; houses vocal cords; prevents foreign objects from entering trachea Trachea (aka,“???”) Passageway for air; mucous membranes filter incoming air Bronchial tree Conducts air from trachea to alveoli; mucous lining filters air Lungs House all “parts” required for gas exchange

Diagrams Review, continued….. What is the function of the epiglottis? Cricoidectomy

Diagrams Review, continued….. How many lobes does the right lung have? The left lung? Why is the right lung larger than the left lung?

Diagrams Review, continued…..

Diagrams Review, continued….. The lungs are lined by pleura: Visceral (???) pleura, which folds back on itself to become Parietal (???) pleura Sounds like what other organ?

Breathing Mechanism Inspiration: breathing in Expiration: breathing out The flow of air into and out of the lungs is controlled by pressure. From chemistry or physical science, what happens to pressure as volume increases? (Boyle’s Law) So, as the diaphragm contracts into the abdominal cavity, increasing volume in the thoracic cavity, what happens to pressure in the thoracic cavity? In which direction will air flow?

Assignment: Read “Topic of Interest” (p.444), and answer the following questions: What are 3 effects of emphysema on the lungs? How would these effects compromise a person’s ability to breathe? What is the #1 way to prevent emphysema? Complete worksheet to review concepts of respiratory system to this point.