Transcript circulation
Circulation Explain why there is a difference between the two tubes. Tube A Tube B The greater Carbon Dioxide in the air breathed out turns the Lime water cloudy. The air breathed in contains very little Carbon Dioxide in comparison. What other difference are there between the air we breathe in and the air we breathe out? 1) There is less Oxygen 2) The air is cleaner 3) The air is damp The Circulatory System There are 3 types of blood vessels Arteries Veins Capillaries Arteries • These carry blood AWAY from the heart (Think Arteries Away = AA) • They are buried deep in the body • They carry oxygen rich blood (except for the pulmonary artery!) Veins • These carry blood IN to the heart • (Think veINs=IN) • They are • They carry oxygen poor blood (except for the pulmonary vein!) Capillaries • These carry blood to the cells • They are narrow vessels running throughout the body • They carry oxygen rich blood from the arteries, past the cells. The oxygen poor blood is then carried to the veins. The Circulatory System Arteries Veins Capillaries Which of these blood vessels: 1. Takes blood away from the heart? 2. Carries oxygenated blood? 3. Contains blood under high pressure? 4. Is only 1 cell thick? 5. Contains valves? Rob the Red Blood Cells Journey! Rob is a new red blood cell and needs direction about where he’s going and what will happen to him on his journey around the body. ? Can you help advise him? Review Questions • • • • Where did Rob pick up Oxygen? Where did Rob take it to? Why did Rob change colour? What things would be floating around Rob in the blood? • What other cells are there in the blood with V____ C____ M___ V___ R____ A____ R____ V______ A______ P_______ V___ L___ A____ L___ V______ Vena Cava Main Vein Right Atrium Right Ventricle Aorta Pulmonary Vein Left Atrium Left Ventricle