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Do Now – 02/23/18

Do Now – 02/23/18. Make a list of different things that circulate? These items can include items both inside and outside of the body. Write in complete sentences!. Cardiovascular System. Mrs. Hill. Cardiovascular System - Cardio- Heart - Vascular- Blood Vessels. Circulatory Functions.

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Do Now – 02/23/18

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  1. Do Now – 02/23/18 • Make a list of different things that circulate? These items can include items both inside and outside of the body. • Write in complete sentences!

  2. Cardiovascular System Mrs. Hill

  3. Cardiovascular System - Cardio- Heart - Vascular- Blood Vessels

  4. Circulatory Functions • To move, circulate, blood around the body. • To transport; oxygen, nutrients, and waste around the body.

  5. Heart Structure • Strongest muscle in the body • Located close to the middle of the chest

  6. Heart is made up of 3 layers • Pericardium (outer layer) - Fluid filled sac that cushions the heart and prevents irritation

  7. Myocardium (bulk of the heart) - Specially constructed muscle tissue cardiac muscle

  8. Endocardium (heart lining) - Tissue that lines the chambers of the heart and the valves of the heart

  9. The heart is divided into 4 chambers • Atrium (upper two chambers) -blood enters the heart into these chambers Ventricles (lower two chambers) -blood exits the heart from these -chambers are larger and have thicker walls -left ventricle has the thickest walls

  10. Valves (permit) the flow of blood in one direction • Tricuspid valve • Between the rt atrium and rt ventricle Mitral valve (bicuspid) • Between left atrium and left ventricle Semilunar Valves - Located inside the pulmonary artery and aorta

  11. Blood Vessels • Arteries - carries blood away from the heart - all arteries carry oxygenated blood, except for the pulmonary artery

  12. Veins - carry blood back to the heart - all veins carry deoxygenated blood, except for pulmonary veins

  13. Capillaries - attach small arteries to small veins - 1 mil long, 25 to make an inch, joined end to end would extend 62,000 miles - allow the transfer of oxygen, nutrients, and waste between cells of the body and blood - this transfer, diffusion, occurs here because the walls are only one cell thick

  14. Do now- 02/27/18 • What are the 3 layers the heart is made up of? • Explain one of the layers. Write in complete sentences!

  15. Circulatory Problems • Heart Disease (Coronary Artery Disease) • Heart Attack- blood supply to the heart is reduced or stopped • Cardiac Arrest- heart stops beating • Hypertension- abnormally high blood pressure in arteries, may increase the chance of a heart attack or stroke

  16. Problems • Leukemia-a cancer of the tissue of the body that produces WBC’s • Anemia-number of RBC’s or hemoglobin is below normal • Hemophilia- a genetic disease in which blood doesn’t clot or clots very slowly • Sickle Cell Anemia-genetic condition, were RBC’s clump together

  17. Heart Anatomy Word Bank • Pulmonary Vein -Aorta • Right Atrium -Inferior Vena Cava • Left Atrium -Pulmonary Artery • Right Ventricle -Septum • Left Ventricle -Superior Vena Cava

  18. Superior Vena Cava Aorta Pulmonary Arteries XX Pulmonary Veins Right Atrium Left Atrium XX XX Left Ventricle Right Ventricle Inferior Vena Cava XX Septum

  19. Resting Heart Rate • 70 Beats per minute • X 60 minutes in an hour • 4200 beats per hour • X 24 hours in a day • 100,800 Beats per day • X 365 Days per year • 36,792,000 Beats per Year • X 75 Years • 2,759,400,00 Beats in a life time

  20. Resting Heart Rate • 60 Beats per Minute • X 60 Minutes in an hour • 3600 Beats per hour • X 24 hours in a day • 86,400 Beats per day • X 365 days per year • 31,536,000 beats in a year • X 75 years • 2,365,200,000 beats in a life time

  21. Resting Heart Rate Difference • 2,759,400,000 Beats in example 1 • -2,365,200,000 Beats in example 2 • 394,200,000 less beats in a lifetime • :- 31,536,000 Beats per year • 12.5 extra years of heart beats

  22. What are some other choices we make that can cause us to use up our heart beats faster.

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