The Plan… 6 March 2013 Silent Read first 15 Review CYU from Yesterday Pg. 81 1-10, 13 & 18 PowerPoint Presentation Circulatory and Respiratory Systems Add the ‘new’ systems to your diagram from start of unit… Complete Handout This will be due Tomorrow You will also receive test review sheets (c) McGraw Hill Ryerson 2007

2.3 The Circulatory and Respiratory Systems The circulatory system consists of the heart, arteries, capillaries, and veins. Your heart is a pump that pushes approximately 4 L of blood through your body every minute. The main purpose of the respiratory system is to exchange gases. The main organ of the respiratory system are the lungs. See pages 82 - 83 (c) McGraw Hill Ryerson 2007

Taking a Closer Look at the Heart The heart pumps blood throughout the body. The heart has four chambers: Left atrium Blood arrives from your lungs Right atrium Blood arrives from your body Left ventricle Pumps blood to your body Right ventricle Pumps blood to your lungs Between each of these chambers is a valve. Make note of the direction of blood flow See page 84 (c) McGraw Hill Ryerson 2007

The Circulatory System The circulatory system moves blood throughout the body. There are three types of blood vessels: Arteries Carry oxygenated blood away from your heart Capillaries Tiny blood vessels responsible for the transfer of oxygen and nutrients into the body’s cells and collecting waste from the cells. Veins Blood containing waste products returning to the heart. See pages 85 - 86 (c) McGraw Hill Ryerson 2007

The Circulatory System SVC & IVC The Circulatory System RV PA B Copy Flowchart Pg. 87 L Starting with the right atrium, try placing the following structures in the correct order that blood flows through the body. Left ventricle (LV) Body (B) Right atrium Left atrium (LA) Lungs (L) Right ventricle (RV) PV A LA LV Now Add: -Aorta (A) -Pulmonary Vein (PV) -Pulmonary Artery (PA) -Superior Vena Cava (SVC) -Inferior Vena Cava (IVC) See pages 87 - 88 (c) McGraw Hill Ryerson 2007

Blood Flow Diagram Blue = Deoxygenated Red = Oxygenated (c) McGraw Hill Ryerson 2007

The Components of Blood About 55% of blood is a liquid called plasma. Contains proteins, minerals, and other substances. Red blood cells carry oxygen from the lungs to the cells. White blood cells fight infection. Platelets are important for clotting blood. See pages 88 -89 (c) McGraw Hill Ryerson 2007

A Video Recap for you… http://www.youtube.com/watch?v=GbttJ- 5do9M (c) McGraw Hill Ryerson 2007

The Respiratory System The respiratory system moves oxygen into your body and carbon dioxide out of your body. When you inhale, air is filtered by tiny hairs called cilia. Air passes through your larynx and continues down your trachea towards your lungs. At the base of the trachea are two tubes called bronchi (brong´ki). Bronchi branch into smaller air tubes called bronchioles (brong´ke-ōl-es). See page 90 (c) McGraw Hill Ryerson 2007

Gas Exchange in the Alveoli There are millions of alveoli at the ends of the bronchioles, and this is where gas exchange takes place. Oxygen and carbon dioxide move back and forth between the alveoli and the surrounding blood vessels. O2 comes into Aveolus and then passes on to the Red Blood Cells, which in turn give back CO2 which is then expelled out of the lungs… See page 91 (c) McGraw Hill Ryerson 2007

Smoking Smoking may cause both respiratory disease and heart disease. Respiratory diseases could include emphysema and lung cancer. Emphysema causes the alveoli walls to lose their elasticity. This may make breathing very difficult. Smoking also destroys the cilia lining your respiratory system. Take the Section 2.3 Quiz See page 92 (c) McGraw Hill Ryerson 2007

For those who are studying for the test… Test includes sections 2.1, 2.2., & 2.3 Specifically: Definitions That big list is due… Diagrams The Body Systems There are eleven of them Digestive & Excretory Sm & Lg Intestine Circulation & Respiratory Heart & Lungs Key Points: I.e. Characteristics of a system, 4 levels of organization, Tissues & functions, Nutrients & functions, 4 stages of digestion & the “parts” included. Suggest you use study guide, Chapter Review & any “Reading Checks” as study tools – along with all CYUs and handouts received… (c) McGraw Hill Ryerson 2007