CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX CO 2 O2O2 O2O2

O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX Respiration exchange and transport of gases carbon dioxide (CO 2 ) leaves cells; oxygen (O 2 ) enters gas exchange occurs across moist membranes covered with blood vessels

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX Structure and Function

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX larynx (voice box) - upper part of trachea; contains vocal cords, 2 bands of tissue stretched across opening of trachea nose (nasal cavity) - warms, filters air as it enters body trachea -air passageway covered with epiglottis Voice Box Video. Stop before it ends

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX bronchi - tubes that carry air from trachea to lungs Alveoli - sac-like organs; site of gas exchange between air and blood bronchioles - smaller tubes that branch from bronchi

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX trachea bronchi lungs diaphragm - dome-shaped muscle that moves up & down in the breathing process bronchioles

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX bronchioles alveoli - grape- like clusters surrounded by network of thin- walled capillaries at the end of bronchioles

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX chest wall muscles contract, lifting and pulling ribs outward, diaphragm pulls downward Inhalation Volume= Pressure=

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX reverses the process Exhalation Volume= Pressure=

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX Inhalation diaphragm chest wall muscles contract, lifting and pulling ribs outward reverses the process Exhalation

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX Gas Exchange

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX tissuealveoli O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 CO 2 capillary CO 2 O2O2 Gas exchange occurs between the thin walls of the alveoli and the thin walls of the capillaries. CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2

O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX Diseases of the Respiratory System

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX asthmanarrowed airways, caused by allergies which clog airways with mucus and produce muscle spasms cystic fibrosis genetic defect which causes excessive production of mucus that clogs airways bronchitisinflammation of bronchi, bronchioles caused by long-term exposure to allergens, cigarette smoke, or other irritants

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX 1 nasal cavity trachea 3 larynx bronchioles lung bronchi diaphragm Name the structure. 2 4

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX Match the structure with the number. nasal cavity trachealarynxbronchioleslungbronchidiaphragm

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX Match the function with the number. dome-shaped muscle that moves up & down in the breathing process smaller tubes that branch from bronchi warms, filters air as it enters body upper part of trachea; contains vocal cords sac-like organs; site of gas exchange between air and blood tubes that carry air from trachea to lungs air passageway covered with epiglottis

CO 2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 © 2006 Plano ISD, Plano, TX