Circulatory System • The transportation system of the body • Circulatory comes from the word “circle” • Blood circles the body: heart Body cells lungs heart Another name for the circulatory system is the cardiovascular system Major Organs and Tissues of the Circulatory System • Heart • Blood Vessels • Blood Why is Circulation Important? The circulatory system transports oxygen and food to the brain, feet, muscles, and every single part of the body. It is very important that the circulatory system in the body keeps going all the time. If it stops, even for a short time then the body will very quickly die. Three Functions of the Circulatory System: 1. To move oxygen and nutrients to all cells of the body 2. To move carbon dioxide and other wastes out of the cells 3. To fight disease The Heart • The heart has 4 chambers: atrium ventricle Parts of the Heart • Atrium - upper chamber • septum - thick tissue that separates left and right side of heart • valve -flap of tissue • ventricle - lower chamber of heart Heart diagram Vena Cava Aorta Pulmonary Vein Circulation movement of through body blood Blood Vessels 3 Kinds of blood vessels • Arteries • Veins • Capillaries Arteries • Arteries ALWAYS carry blood AWAY from the heart VEINS carry blood TO the heart CAPILLARIES connect arteries to veins artery vein Capillaries are where cells connect to blood. Oxygen, and nutrients are exchanged for carbon dioxide and wastes. Special Veins and Arteries • The Aorta is the largest artery in the body leading from the heart • The Vena Cava is the largest vein in the body, and leads to the heart • The pulmonary artery and pulmonary vein connect the heart to lungs What is the meaning of the cartoon? What did we learn with the heart run around? • What do cells use up to make energy? • When you exercise do cells use it faster or slower? • How does oxygen get from your lungs to your body cells? • What makes blood move? • What did we simplify? • Cells must always have energy. If it is used up faster it must be replaced faster. This means that the heart must ______________ Do Now • In journal, describe what is happening on SIDE A of the handout. • HINT: Think about our game we played yesterday. Capillaries Side A • Oxygenated blood comes from the heart and goes through the organ where it becomes de-oxygenated blood. • Describe what is happening on side B of the handout. Capillaries Side B • Shows blood picking up waste and carbon dioxide from the organ and blood giving the organ water, nutrients and oxygen. The blood stays in the capillary. Water can go both ways. Cardiovascular Blood Flow, Heart anatomy Coronary arteries Click Cardiovascular , then blood flow Step through blood flow Blood flow electric Circulation and also heart anatomy and anterior How the heart works heartbeat http://www.phschool.com/atschool/phbio/active_art/heart/index.html Circulatory system matching • • • • • • • • • • 1. E 2. G 3. I 4.A 5. F 6. C 7. B 8. J 9. D 10. H Pulmonary artery - carries blood from heart to lungs Blood is a liquid tissue • Blood is a mixturepart liquid and part solid • Plasma is liquid part of blood • Clotting is controlled by platlets Red Blood Cell- contains hemoglobin (iron compound) which carries oxygen White Blood Cells fight disease Platelets - form clots Gas Exchange • The pulmonary blood vessels take the blood from the heart to the lungs. • They drop off wastes and pick up oxygen • Then the blood goes back to the heart