The Circulatory System

1. The Circulatory System

2. The human circulatory system consists of the heart, blood vessels, and the blood.

3. The circulatory system works like a highway in a city. Your blood delivers nutrients and oxygen to the tissues in your body just like the highways are used to deliver goods in a city.

4. Arteries – deliver oxygenated blood AWAY from the heart. Veins – deliver “used” (deoxygenated) blood to the heart so that it can pick up oxygen. Blood appears red when it has oxygen in it. Blood appears blue when it does not contain oxygen.

6. Cardiac – having to do with the heart Pulmonary - having to do with the lungs

7. 2 Types of Circulation: Systemic – the blood flows through the whole body Pulmonary - blood flows through the heart and the lungs

8. Your heart consists mostly of muscle called cardiac muscle. It is a large pump that sends the blood through your body

9. Label your diagram as we go!

10. _____________ – the largest artery in the body. It delivers blood from the heart to the rest of the body.

11. Aorta – the largest artery in the body. It delivers blood from the heart to the rest of the body. Aorta

12. ___________________________ – brings deoxygenated blood from the top of the body to the heart (needs oxygen). Aorta Aorta

13. Superior vena cava – brings deoxygenated blood from the top of the body to the heart (needs oxygen). Aorta Aorta Superior Vena Cava

14. ________________________________ – brings deoxygenated blood from the lower part of the body to the heart Aorta Aorta Superior Vena Cava

15. Inferior vena cava – brings deoxygenated blood from the lower part of the body to the heart Aorta Aorta Superior Vena Cava Inferior Vena Cava

16. ______________________ – Takes deoxygenated blood from the heart and gives it to the lungs where it collects oxygen Aorta Superior Vena Cava Inferior Vena Cava

17. Pulmonary artery – Takes deoxygenated blood from the heart and gives it to the lungs where it collects oxygen Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Inferior Vena Cava

18. ________________________________ – move oxygenated blood from the lungs into the left ventricle of the heart Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Inferior Vena Cava

19. Pulmonary vein – move oxygenated blood from the lungs into the left ventricle of the heart Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Pulmonary Veins Pulmonary Veins Inferior Vena Cava

20. ______________________ – chambers where the blood enters the heart Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Pulmonary Veins Pulmonary Veins Inferior Vena Cava

21. Atria – chambers where the blood enters the heart Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Pulmonary Veins Pulmonary Veins Right Atrium Inferior Vena Cava

22. Atria – chambers where the blood enters the heart Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Pulmonary Veins Pulmonary Veins Left Atrium Right Atrium Inferior Vena Cava

23. ___________________ – the lower chambers that pump blood out of the heart Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Pulmonary Veins Pulmonary Veins Left Atrium Right Atrium Inferior Vena Cava

24. Ventricles – the lower chambers that pump blood out of the heart Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Pulmonary Veins Pulmonary Veins Left Atrium Right Atrium Right Ventricle Inferior Vena Cava

25. Ventricles – the lower chambers that pump blood out of the heart Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Pulmonary Veins Pulmonary Veins Left Atrium Right Atrium Right Ventricle Left Ventricle Inferior Vena Cava

26. _____ – a “flap” that keeps blood from flowing backwards Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Pulmonary Veins Pulmonary Veins Left Atrium Right Atrium Right Ventricle Left Ventricle Inferior Vena Cava

27. Valve – a “flap” that keeps blood from flowing backwards Aorta Pulmonary Artery Superior Vena Cava Pulmonary Artery Pulmonary Veins Pulmonary Veins Left Atrium Right Atrium Bicuspid/Mitral Valve Tricuspid Valve Aortic Valve Right Ventricle Left Ventricle Inferior Vena Cava

30. Blood flows through the heart like this: Body __________________  _______________ __________________  _______________________________  _____________(picks up oxygen)  ___________________  _____________  _____________________  _____________ _______________

31. Blood flows through the heart like this: BodySuperior and inferior vena cava _______________ __________________  _______________________________  _____________(picks up oxygen)  ___________________  _____________  _____________________  _____________ _______________

32. Blood flows through the heart like this: BodySuperior and inferior vena cavaRight atrium __________________  _______________________________  _____________(picks up oxygen)  ___________________  _____________  _____________________  _____________ _______________

33. Blood flows through the heart like this: BodySuperior and inferior vena cavaRight atriumRight ventricle _______________________________  _____________(picks up oxygen)  ___________________  _____________  _____________________  _____________ _______________

34. Blood flows through the heart like this: BodySuperior and inferior vena cavaRight atriumRight ventriclePulmonary arteries _____________(picks up oxygen)  ___________________  _____________  _____________________  _____________ _______________

35. Blood flows through the heart like this: BodySuperior and inferior vena cavaRight atriumRight ventriclePulmonary arteriesLungs (picks up oxygen)  ___________________  _____________  _____________________  _____________ _______________

36. Blood flows through the heart like this: BodySuperior and inferior vena cavaRight atriumRight ventriclePulmonary arteriesLungs (picks up oxygen) Pulmonary veins _____________  _____________________  _____________ _______________

37. Blood flows through the heart like this: BodySuperior and inferior vena cavaRight atriumRight ventriclePulmonary arteriesLungs (picks up oxygen) Pulmonary veinsLeft atrium _____________________  _____________ _______________

38. Blood flows through the heart like this: BodySuperior and inferior vena cavaRight atriumRight ventriclePulmonary arteriesLungs (picks up oxygen) Pulmonary veinsLeft atriumLeft ventricle _____________ _______________

39. Blood flows through the heart like this: BodySuperior and inferior vena cavaRight atriumRight ventriclePulmonary arteriesLungs (picks up oxygen) Pulmonary veinsLeft atriumLeft ventricleAorta _______________

40. Blood flows through the heart like this: BodySuperior and inferior vena cavaRight atriumRight ventriclePulmonary arteriesLungs (picks up oxygen) Pulmonary veinsLeft atriumLeft ventricleAortaBody

41. There are 3 types of blood vessels: Veins – take deoxygenated blood to the heart Arteries – move oxygenated blood from the heart to the body. Capillaries – the smallest blood vessels.

42. Capillaries – the smallest blood vessels. They bring oxygen and nutrients to the tissues and absorb carbon dioxide and waste so that the body can get rid of these bad things. CO2 O2 waste nutrients waste nutrients CO2 O2

43. When the heart contracts, it pushes a wave fluid (blood) through the arteries. The force of the blood on the walls of the arteries is called blood pressure.

44. Normal blood pressure is 120/80 Systolic pressure – the force felt in the arteries when the ventricles contract (top number) Diastolic pressure – the force felt when the ventricles relax (bottom number)

46. BLOOD FACTS * In one drop of blood, there is 5 million red blood cells, 8,000 white blood cells, and 250, 000 platelets. * * In an adult’s body, there are 10.6 pints of blood circulating around. * White Blood Cell Red Blood Cell Platelet

47. FUNCTIONS OF BLOOD: • Transports nutrients, dissolved gases, enzymes, hormones, and waste products • Regulates body temperature, pH and electrolytes • Protects body from invaders • Restricts loss of fluids

48. COMPONENTS OF BLOOD: • Plasma: liquid portion of blood that • contains water, dissolved fats, salts, sugars and proteins • Red Blood Cells (erythrocytes): transport oxygen • White Blood Cells (leukocytes): protect body against • invasion by foreign cells or substances • Platelets: Responsible for the clotting of blood

49. TYPES OF BLOOD CELLS: • Erythrocytes: “red blood cells” aka RBC’s • slightly indented, flattened disks • RBC’s have a life span of 4 months • contain an iron-rich protein called hemoglobin. Blood gets its bright red color when hemoglobin picks up oxygen in the lungs. As the blood flows, hemoglobin releases oxygen to the tissues.

50. Leukocytes: “white blood cells” aka WBC’s • defend against infection • 2 kinds of leukocytes: Phagocytes Lymphocytes both travel along the walls of blood vessels to fight germs like bacteria and viruses • the body contains fewer WBC’s than RBC’s, but the body will produce more WBC’s during an infection