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Understanding the Circulatory System: Blood Flow, Heart Function, and Vessel Types

The circulatory system plays a vital role in delivering oxygen and nutrients to every cell in the body, with no cell being more than two cells away from a blood vessel. This intricate system consists of three main types of blood vessels: arteries that carry blood away from the heart, veins that return it, and capillaries, the smallest vessels where exchange occurs. Our heart, with its four chambers - two atria and two ventricles - works tirelessly to pump blood throughout our body, contributing to a vast network of approximately 96,000 kilometers of blood vessels. Learn more about how this complex system operates and its importance to our health.

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Understanding the Circulatory System: Blood Flow, Heart Function, and Vessel Types

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Presentation Transcript

  1. 3.2 The Circulatory System Text book pages 68-70

  2. Vocabulary: • Arteries • Veins • Capillaries • Atria • Ventricle

  3. Circulatory system • Brings every cell oxygen • No cell is more than 2 cells away from a blood vessel

  4. WOW!! • We have 60 trillion cells (60, 000, 000, 000, 000)

  5. 1, 000, 000

  6. 100, 000, 000

  7. 1, 000, 000, 000

  8. 1, 000, 000, 000, 000

  9. WOW WOW • We have 96 000 km of blood vessels (the earth is 40, 075.16 km around…. So that is MORE then twice around the earth!!

  10. Circulation • Blood in vessels carry: • O2 and nutrient fluids to the cells • CO2 and waste away from cells • 3 main types of vessels: • Arteries: carry blood away from heart • Veins: carry blood to the heart • Capillaries: smallest vessel (size of 1 RBC)

  11. Our Heart • 4 chambers • Two atria • Receive blood into heart • Top or heart • Two ventricles • Pumps blood away from hearth • Bottom of heart • Stronger, more muscular

  12. Flow of blood through the heart: • Veins (deoxygenated blood from body) • Right atrium (RA) • Right ventricle (RV) • Lungs (get exchange CO2gas for O2gas at the alveoli) • Left atrium (LA)(oxygenated blood form lungs • Left ventricle (LV) • Aorta • Body

  13. Circulation song • http://www.youtube.com/watch?v=LqhvmUEdOYY&p=9C8E1219DB4742B9&index=21

  14. A one-way flow • Valves = one way doors • Found between RA and RV, and LA and LV • Ventricles and arteries • In veins

  15. Our heart beat • “LUBB” “DUBB” • “LUBB” = ventricles contracting and closing valves between Atria and Ventricles • “DUBB” valves closing between the arteries and the ventricles

  16. Heart Beat animation: http://www.youtube.com/watch?v=AOiyjNFB0as

  17. Heart video • http://www.youtube.com/watch?v=S3vY5oyXmeI

  18. Circulation song • http://www.youtube.com/watch?v=LqhvmUEdOYY&p=9C8E1219DB4742B9&index=21

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