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Circulatory System Moves O2, CO2 and other materials around the body. 06-10-2011 Warm-Up List any questions, comments or interesting things you have from both… a) Digestive system lessons b) Guest speaker yesterday Circulatory System • Main purpose of the system = to deliver blood to the body’s tissues • Blood carries oxygen, dissolved gasses and nutrients • Made of blood vessels, arteries, veins and capillaries • 2 circulatory systems – From heart to lungs and back (pulmonary) – From heart to other parts of the body (systemic) The Heart Main Purpose: a hollow muscular pump that moves blood throughout the body Our heart pumps faster when we need more oxygen in our bodies (exercising, frightened or excited) Made of 4 different chambers separated by valves and septum. The Heart: Atria (Atrium <- singular) Main Purpose: upper 2 chambers of the heart that receive blood entering the heart The Heart: Ventricles Main Purpose: bottom chambers of the heart that pump blood out of the heart http://www.youtube.com/watch?v=WXwYYsi6 z7Q&feature=related 06-13-2011 Warm-Up What is the name and purpose of the… a) Upper two chambers of the heart b) The bottom two chambers of the heart ALL LATE WORK DUE BY FRIDAY!!! Study Club = Wednesday, Friday (re-opened turning in your dragons) The rest of this school year… Monday and Tuesday = finish the circulatory and respiratory systems Wednesday and Thursday = research days Friday (last day for late work) and Monday = study days Tuesday = TEST day Wednesday = movie Thursday = letter writing party Friday = last day of school To go back out to the body Out to the lungs In from the body Back into the heart How blood moves outside of the heart. Arteries Blood vessels that carry blood away from the heart. They are the thickest vessels with muscular walls that contract to keep the blood moving away from the heart. Typically shown in RED Special Arteries Aorta: the body’s largest blood vessel which pumps oxygen rich blood from the heart to the rest of the body Pulmonary Artery: Carries oxygen-poor blood away from the heart to the left and right lungs. Veins Veins carry blood back to the heart. They are much thinner and not as muscular but contain valves to prevent blood from flowing backwards. Capillaries Tiny vessels that connect the arteries and veins. Even though they are tiny they are the most important part of the circulatory system. Through them nutrients and oxygen are delivered to the cells. Pulmonary System Pulmonary Artery Aorta Ventricles Atria Capillaries Systemic System http://www.youtube.com/watch?v=D3ZDJgFDdk0 VEINS ARTERY http://www.youtube.com/watch?v=rBQOLiFto 6Q 06-14-2011 Next Tuesday This Friday Warm-Up 1) When is your test? 2) When is the last day for late work? 3) What day is the last day school has a study club bus? This Friday Respiratory System Take a deep breathe and count to ten… Respiratory System Main Purpose: to take in air from the environment, filter it to get oxygen and then release carbon dioxide from our body Throat (Pharynx) and Epiglottis Throat Main Function: To transport air to the trachea and bronchi (and food to the digestive system). Epiglottis M.F: prevents food from traveling into the air-only passage of our throat. Trachea Main Function: Connects the throat to the bronchi and helps transport air and protect lungs. Made up of 16-20 rings of cartilage and muscle which makes it felixble and able to twist. It also has a mucus membrane to filter foreign items. Lungs: Bronchi and Bronchioles Main Function: small tubes that connect the lungs to the trachea and deliver air to the alveoli. They can be as thin as a strand of hair and are made of cartilage and skin like tissues. Lungs: Alveoli Main Function: where the exchange of oxygen and carbon dioxide takes place. These are tiny air sacs that could cover a tennis court if they were spread out. Diaphragm Main Function: Separates your chest from your abdomen. It helps create pressure so our lungs can expand and relax as we breath. http://www.youtube.com/watch?v=V8VIw0fk4 X0 Magic School Bus – Inside Ralphie http://www.youtube.com/watch?v=rdxggVj0_y M&feature=related Blood substitute (talks about blood moving oxygen around the body) http://www.pbs.org/teachers/connect/resourc es/5763/preview/ Human heart preview.. Shows how blood pumped through http://www.pbs.org/teachers/connect/resourc es/4053/preview/ History of our understanding of the human heart http://www.pbs.org/teachers/connect/resourc es/5616/preview/ Interactive tour of the heart http://www.pbs.org/teachers/connect/r esources/5618/preview/