 What are the three regions of the pharynx?  Why is a person’s sense of taste diminished when they have a stuffy nose?  What are the names of your tonsils? Where are they located? CHECK YOUR UNDERSTANDING

 Trachea  AKA “_______”  About __cm long  Extends from larynx to the ____ thoracic vertebrae, “mid-chest”  Lined with ______ membrane  Covered with ____  Continuously sweeps foreign matter upward toward the ______ and _______ where it can be swallowed or coughed up LOWER RESPIRATORY TRACT

 Trachea  Reinforced with _________ rings  “C-Shaped”  2 functions  _______: support and prevent the airway from collapsing  _______: doesn’t contain cartilage; flexible and allow the trachea to expand; helpful when large food particles pass through LOWER RESPIRATORY TRACT

 Bronchi  Trachea divides into left and right ______ bronchi  Lead to the right and left lungs  Right side  ______, shorter, more _______  ______ likely to have substances become lodged in LOWER RESPIRATORY TRACT

 Respiratory Tree  Primary Bronchi  Divide into smaller branches  _______ and ________ bronchi  Reinforced by _________ rings  Branch into smaller ones called _________  Not supported by cartilaginous rings LOWER RESPIRATORY TRACT

 Lungs  Alveoli  Respiratory zone  ________ ducts  Lead to grape-like clusters called _______ LOWER RESPIRATORY TRACT

 Alveoli  Where ___ exchange occurs  ________ of alveoli make up the lung tissue  Thin, squamous, ________ cells  Coated with a _________ (phospholipid) LOWER RESPIRATORY TRACT

 Alveoli  Kept clean by ________  Gases and macrophages pass between alveoli via pores of _____ LOWER RESPIRATORY TRACT

 Alveolar Capillary Membrane  _______ diffuses easily across into the capillaries  _______ diffuses from the capillaries into the aveoli LOWER RESPIRATORY TRACT

 _______ surface area  Laid side by side would cover almost an entire ______ court  Razor thin membranes  Breathing Animation Breathing Animation LOWER RESPIRATORY TRACT