Exercise 1: Anatomy of the Respiratory System

Anatomy & Physiology

Lab Week 1: Respiratory System Part 1: Anatomy

Using the model & your text book, trace the airflow through the respiratory system starting with the external nares. Number the structures in order from 1 through 17.

____ alveolar duct ____ nasopharynx ____ alveolar sac ____ oropharynx ____ alveolus ____ primary bronchus ____ bronchiole ____ external nares ____ respiratory bronchiole ____ secondary bronchus ____ internal nares ____ terminal bronchiole ____ larynx ____ tertiary bronchus ____ laryngopharynx ____ trachea ____ nasal cavity

Station 2: Matching structure & function

Using the cue cards located at your station, match the structure with the correct function and then complete the following:

______tubular airways that begin the respiratory zone ______connects the laryngopharynx with the trachea ______tube-like structure that conducts air from the larynx to the bronchi ______closes over the glottis during swallowing ______keep the trachea from collapsing ______division of the bronchi that enter bronchopulmonary segments ______last division of the conducting zone ______conducts air from the nasopharynx to the laryngopharynx ______small round sacs where gas exchange occurs ______small conduction airway that serves a lobule

Station 3: Histology

Match the type of epithelium with it’s location in the respiratory system & describe it’s function Epithelium Function a) pseudostratified ciliated columnar ______b) simple columnar c) simple cuboidal d) simple squamous ______e) stratified squamous ______Location ____ nasal cavity through nasopharynx ____ oropharynx through larynx above vocal cords ____ larynx below vocal cords through primary bronchi ____ secondary bronchi through tertiary bronchi ____ bronchioles through beginning of respiratory bronchiole ____ end of respiratory bronchiole though alveolus

ALSO Look at the dissection of the thorax on http://www.anatomy.wisc.edu/courses/gross/index.html

First 10 minutes Station 4: Part A

Using the bone models provided, review the following bones associated with respiration

Bones of the skull Bones of the Thorax Frontal Sternum Maxilla -manubrium Mandible -body Zygomatic -xyphoid process Ethmoid Clavicle Sphenoid Ribs Nasal septum - 7 true Nasal Conchae - 5 false Nasal Meatus - 2 floating Hard palate Cervical & Thoracic Spine

Part B Using the muscle model, identify & label the following muscles of respiration

Inspiration Expiration A E B C D 1. Using the cards located at your station and the attached diagram, match the respiratory muscles to their function: ______a) elevates 3rd, 4th & 5th ribs ______b) elevates the sternum ______c) depresses ribs ______d) compress abdominal contents & increases abdominal pressure ______e) elevates 1st & 2nd ribs ______f) elevates ribs ______g) main inspiratory muscle ______h) 2 muscles used in forced expiration ______

Indicate whether the volume or pressure increases or decreases during inspiration & expiration:

Volume or Pressure Inspiration Expiration Thoracic volume Intrapleural pressure Lung volume Alveolar (intrapulmonary) pressure

Station 5: Interaction

Using your Wiley Plus complete the following 3 exercises:  1. Build an airway  2. Paint the lung  3. The airway You may use the computers in lab