Set up Cornell Notes on pg. 71

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The Respiratory System

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The Respiratory System

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Set up Cornell Notes on pg. 71 Topic: 30.2 Respiration and Gas Exchange Essential Question(s): Explain how diffusion allows gases to move into and out of the alveoli of the lungs. In what ways can respiratory diseases reduce the level of O2 in the blood? 30.2 Respiration and Gas Exchange 2.1 Atoms, Ions, and Molecules

KEY CONCEPT The respiratory system exchanges oxygen and carbon dioxide.

Oxygen and carbon dioxide are carried by the blood to and from the alveoli. Gases move by diffusion- higher concentration to lower concentration

Breathing is regulated by the brain stem. The medulla oblonga sends messages through the nervous and endocrine systems that stimulate the diaphragm and rib cage muscles to work harder. pons medulla oblongata

Respiratory diseases interfere with gas exchange. Lung diseases reduce airflow and oxygen absorption. Emphysema destroys alveoli. Shortness of breath Asthma constricts airways Bronchitis inflammation of the mucus membranes of the bronchus Cystic fibrosis produces sticky mucus

Smoking is the leading cause of lung diseases.

Practice for your test tomorrow!!! Word Bank: Lungs Epiglottis Bronchioles Nose Trachea Alveoli Diaphragm Bronchi Mouth 1. 9. 8.

nose mouth epiglottis trachea bronchi lungs bronchioles diaphragm 1. epiglottis trachea bronchi lungs 9. bronchioles diaphragm alveoli 8.