BIOL 2402 LAB ASSIGNMENT CHAPTER 11 [2020] –RESPIRATORY SYSTEM– University of Texas | BIOL2402 LAB ASSIGNMENT CHAPTER 11 [2020] –RESPIRATORY SYSTEM

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BIOL 2402 LAB ASSIGNMENT CHAPTER #11 [2020] –RESPIRATORY SYSTEM– University of Texas BACKGROUND: Your cells require oxygen for metabolic reactions and produce carbon dioxide as a waste product... of metabolism – this is necessary for your regulation of homeostasis. Your respiratory system is also involved in regulating the body’s acid-base balance, blood gases, & other homeostatic controls of the circulatory system; it works in coordination with the circulatory and urinary systems. ANIMATIONS: RESPIRATORY System From the HOME screen, click the drop-down box on the MODULE menu. From the systems listed, click on RESPIRATORY. Navigate to & click on the ANIMATION – RESPIRATORY System Overview, and answer the following: What are the 2 functions of the Respiratory System? to move air into and out of the lungs and provides a surface for gas exchange Name the structures of the Upper Respiratory Tract. Of the Lower Respiratory tract. Upper: External nose, nasal cavity, and pharynx Lower: larynx, trachea, bronchi, and lungs What effect does the nasal cavity have on inhaled air? Cleans, warms and humidifies - - -- - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - avigate to & click on the DISSECTION – Lower Respiratory System, Anterior View. Click through LAYERS 1 through 5, focusing on LAYER 2, in the Layer Controls window to answer the following: How many lobes in the left lung? In the right lung? 2 Why is there a difference in the number of lobes in the 2 lungs? Left lung smaller allowing for smapce for heart within the cavity Name the structures formed by the bifurcation of the trachea. Which of the 2 is where foreign bodies that enter the trachea tend to pass? Left and right main bronchus. Tend to pass through right Name the branches emanating from the main bronchi. How many are found in each lung? Lobar bronchus. 2 left three right - - - - - - - - - - - - - - -- - - - - -Posterior-Anterior. Click the TAGS ON/OFF, Mouse over the Pins, and Identify BOTH the Respiratory & NON-Respiratory System Structures. What structure is highlighted in this view? Bronchial tubes Navigate to & click on HISTOLOGY – Trachea. Select Both Views LM: Low & High Magnification. What type of cartilage provides support for a majority of the respiratory tract? Hyaline What tissue type makes up the epithelial layer? What is its function? Ciliated pseudostratified columnar. Humidifying air, creates mucus blanket, help move mucus and particulates, prevent foreign particles from entering - - - - - - - - -- - - - -- - - -- - - - - Navigate to & click on HISTOLOGY – Respiratory Epithelium. Select View LM: High Magnification. Name the mucous-producing epithelial cells. What is the purpose of the mucus? Lamina Propria What is the function of the cilia on the ciliated epithelial cells? Help move mucus and particualte matter along resp. tract. Navigate to & click on HISTOLOGY – Alveolus. Select Both Views LM: Low & High Magnification. What is the function of the interalveolar wall? What cells line it? Diffusion barrier between alveolar air and blood capillary Lined with continuous layer of alveolar type 1 Squamous cells and septal cell How thick or thin is it? .5µm in thickness [Show More]

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