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The Heart

Circulatory System. The Heart. How many times a day does your heart beat?. a. over 10,000 times. b. over 100,000 times. c. over 1,000,000 times. d. over 10,000,000 times. Circulatory System.

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The Heart

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  1. Circulatory System The Heart

  2. How many times a day does your heart beat? a. over 10,000 times b. over 100,000 times c. over 1,000,000 times d. over 10,000,000 times

  3. Circulatory System the name given to the heart, blood vessels and blood which transport oxygen and nutrients to all parts of the body as well as carry away waste products

  4. connective tissue made of plasma and cells blood heart muscular pump to move blood veins, arteries, capillaries that deliver blood to all parts of body blood vessels Components of the Circulatory System

  5. Structure of the Heart

  6. hollow, muscular organ about the size of your clenched fist primary organ of circulatory system pumps about 3,400 gallons/blood a day can pump up to 12 gallons per minute

  7. 4 chambers LeftAtrium Right Atrium Left Ventricle Right Ventricle

  8. aorta pulmonaryartery main artery of the circulatory system only artery that carries oxygen-poor (deoxygenated) blood

  9. septum semilunar valves wall separating two ventricles preventing mixing of blood a valve between each ventricle of the heart and the artery connected to that ventricle, preventing blood from flowing back into the heart

  10. 1 6 5 2 4 3 Which part sends blood to all parts of the body? What single term describes structures 2, 3, 4, and 6? Which parts are the atria? Which parts are the ventricles? Identify the parts of the heart.

  11. Circulation

  12. Blood Flow through the Heart

  13. Step 1 Blood flows from two large veins into the right atrium.

  14. Step 2 The blood then flows down to the right ventricle

  15. Step 3 From the right ventricle, blood is pumped to the lungs where CO2 is exchanged for O2. (CO2 - waste product from cells)

  16. Step 4 After O2 is added in the lungs, blood returns to the left atrium.

  17. Step 5 The blood is then sent to the left ventricle.

  18. Step 6 The left ventricle pumps blood away from the heart to the rest of the body via the aorta. aorta - main artery of the body

  19. lungs Blood leaves the heart, passes through arteries until it reaches capillaries located throughout the body.

  20. lungs In the capillaries, CO2 and waste products are exchanged for O2 and nutrients.

  21. lungs Blood returns to heart through the veins.

  22. deoxygenated blood TO lungs oxygenated blood FROM lungs

  23. Gas Exchange

  24. O2 O2 O2 O2 O2 O2 O2 O2 tissue capillary alveoli CO2 Gas exchange occurs between the thin walls of the alveoli and the thin walls of the capillaries. CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 O2 CO2 O2 O2 O2 O2 O2 O2 O2 O2 O2 O2 CO2 CO2

  25. Blood: A specialized body fluid that delivers substances to the body’s cells (such as oxygen and nutrients) and takes waste away.

  26. What is blood? Click here to see a video!

  27. Blood Consists Of… Plasma Red Blood Cells White Blood Cells Platelets

  28. Blood Consists Of… All blood cells are suspended in plasma, which is made up mostly of water but also contains proteins, sugars, hormones, and salts.

  29. Blood Consists Of… Red Blood Cells- carry oxygen to the cells of the body and take away carbon dioxide; they are produced in the bone marrow; make up 40-45% of blood and give blood its red color; live 4 months

  30. Blood Consists Of… White Blood Cells- fight infection such as bacteria and viruses that get into your body

  31. Blood Consists Of… Platelets- plug holes in blood vessel walls; stick to wound’s edges and each other to slow loss of blood if you get cut (forms a scab)

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