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Topic : Circulatory System Aim : Explain the function and structure of the circulatory system.

Topic : Circulatory System Aim : Explain the function and structure of the circulatory system. Do Now : In 3 sentences , describe the difference in function between the three types of blood vessels. HW : Complete Blood Vessels and Circulation Part B (#’s 1-4).

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Topic : Circulatory System Aim : Explain the function and structure of the circulatory system.

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  1. Topic: Circulatory System Aim: Explain the function and structure of the circulatory system. Do Now: In 3 sentences, describe the difference in function between the three types of blood vessels. HW: Complete Blood Vessels and Circulation Part B (#’s 1-4)

  2. Identify the blood vessel being described (A, V or C). • Largest and most muscular blood vessels. • The smallest blood vessels. • Capillaries carry blood to these blood vessels. • Blood vessel used to feel your pulse. • Carry blood to other organs. • Where the exchange of substances between the blood and cells occurs. • Most of these carry deoxygenated blood back to the heart. • Contain valves to prevent the backflow of blood. • Carry blood under high pressure. • Red blood cells travel move in single file.

  3. http://www.youtube.com/watch?v=NYB-rJZQt4w

  4. Function (Cardiovascular System) • TRANSPORT: carries substances throughout the body

  5. O2 and nutrients (to cells) • Wastes (away from cells) • Hormones, enzymes, blood cells, etc…

  6. Heart Facts • Hold out your hand and make a fist. If you're a kid, your heart is about the same size as your fist, and if you're an adult, it's about the same size as two fists. • Your heart beats about 100,000 times in one day and about 35 million times in a year. During an average lifetime, the human heart will beat more than 2.5 billion times. • Give a tennis ball a good, hard squeeze. You're using about the same amount of force your heart uses to pump blood out to the body. Even at rest, the muscles of the heart work hard--twice as hard as the leg muscles of a person sprinting.

  7. Heart • Cardiac muscle • Pumps blood

  8. R L

  9. Parts of the heart

  10. Atria: • Upper chambers • Receive blood • R and L

  11. 2. Ventricles: • Lower chambers • Pump blood out of heart • R & L

  12. Thicker & muscular bc pump blood to rest of body

  13. 3. Septum= thick wall that separates right & left sides

  14. 4. Valves = flaps of tissue bw atria and ventricles • Prevent backflow of blood

  15. Dub Lub If you listen to your heartbeat, it makes a lub dub sound. What you hear is the sound of the valves closing as they pump 4,300 gallons of oxygen rich blood a day.

  16. Left atrium Valves Left Ventricle Right Atrium Right Ventricle Valves

  17. Blood flow in the heart

  18. Right side:deoxygenated blood • To the LUNGS • Left side: oxygenated blood • From LUNGS • To all body parts

  19. RIGHT (deoxygenated) LEFT (oxygenated)

  20. Blood pumped on each side of the heart DOES NOT MIX!!

  21. Topic: Review Aim: Let’s review circulation and the digestive system Do Now: Describe the path of blood through the body starting at the right atrium. HW: Science Fair Data and Conclusion due Monday!!!

  22. Let’s summarize… • Explain the function of the circulatory system. • Describe the four chambers of the heart. • Explain the importance of heart valves. • Why is the septum so important? • Where is deoxygenated blood pumped to? • Where is oxygenated blood pumped to?

  23. Right atrium (DB) • Right ventricle (DB) • Pulmonary arteries (DB) • Lungs (OB) • Pulmonary Veins (OB) • Left atrium (OB) • Left ventricle (OB) • Aorta (OB) • Rest of the body • Vena Cava (DB) • Right atrium (DB)

  24. http://www.brainpop.com/health/bodysystems/circulatorysystem/http://www.brainpop.com/health/bodysystems/circulatorysystem/ http://www.brainpop.com/health/bodysystems/heart/

  25. Review: Identify the part of the heart being described. • Chamber that receives oxygenated blood. • Wall that separates the right and left side of the heart. • Chamber that pumps out deoxygenated blood. • Chamber that receives deoxygenated blood. • Prevents the backflow of blood between atria and ventricles. • Chamber that pulps out oxygenated blood.

  26. Atherosclerosis

  27. Autopsy specimen of aorta has been opened lengthwise to reveal luminal surface studded with lesions of atherosclerosis.

  28. Coronary atherosclerosis

  29. Hypertension

  30. Coronary Thrombosis

  31. Heart attack • Caused by BLOCKAGE of coronary artery • O2 does not get to heart muscle

  32. http://www.smm.org/heart/heart/in-out.htm

  33. http://www.smm.org/heart/heart/pumping.htm

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