1. The Circulatory System

2. Function It’s main function is Transportation Blood is used as a transport vehicle transports oxygen, nutrients, cell waste (such as Carbon dioxide), hormones and antibodies vital to maintaining homeostasis to and from cells

3. Parts of the Circulatory System Divided into three major parts: The Heart The Blood Vessels The Blood

4. The Major Organ-The Heart Heart acts as pump The heart pumps 60-80 beats per minute (at rest) At REST, the heart pumps about 5 QUARTS of blood a minute. During EXTREME EXERTION (exercise) it can pump 40 quarts a minute.

5. Structure Size of your fist Large organ composed of – cardiac muscle--called myocardium – Enclosed by a sac –called PERICARDIUM – rich in mitochondria – 4 hollow chambers – Contain valves to keep blood flowing in ONE direction

6. The pathway looks like a circle The heart, the lungs, and the blood vessels work together to form the circle part of the circulatory system.

7. The Chambers The heart has 4 hollow chambers Upper chambers – atrium receives blood coming in from the veins Left & right Atrium Lower chambers - ventricle squeezes blood out into the arteries Left & right ventricle

9. Double Pump The two ventricles are responsible for the pumping action of the heart Each chamber pumps blood out of the heart but to different pathways That is why the heart is considered to be a double pump

10. 3 Kinds of Circulation: Pulmonary circulation Coronary circulation Systemic circulation

11. Blood Vessels Hollow tubes that circulate your blood Arteries Veins Capillaries

12. Arteries Carry blood AWAY from the heart Heart pumps blood Main artery called the aorta Aorta divides and branches Many smaller arteries Each region of your body has system of arteries supplying it with fresh, oxygen-rich blood.

13. Capillaries Very thin Only one cell thick Connect arteries & veins Food and oxygen released to the body cells Carbon dioxide and other waste products returned to the bloodstream

14. Veins Carry blood to the heart Receive blood from the capillaries Transport waste-rich/ oxygen-poor blood back to the lungs and heart Valves are located inside the veins Allow blood to move in one direction

15. Blood Carries nutrients, water, oxygen and waste products to and from your body cells. Hemoglobin, iron containing molecule Loosely picks up oxygen in the lungs Loses oxygen in areas low in oxygen (diffuses)

16. Blood – RBCs Red blood cells carry oxygen from the lungs to all the cells of the body. Takes carbon dioxide and transports it back to the lungs About 5,000,000 Red Blood Cells in ONE drop of blood.

17. Blood – WBCs White blood cells protect the body from germs Attack and destroy germs when they enter the body

18. Blood – Platelets and Plasma Platelets are blood cells that help stop bleeding Plasma is the liquid part of the blood About half of your blood is made of plasma The plasma carries the blood cells throughout the body Plasma is made in the liver.

19. user.gru.net/clawrence/ vccl/chpt7/plate.htm

20. SUMMARY copy and complete the following; Arteries take blood ______ from the heart. The walls of an artery are made up of thick _________ walls and elastic fibres. Veins carry blood ________ the heart and also have valves. The _________ link arteries and veins, and have a one cell thick wall. Blood is made up of four main things ______, the liquid part of the blood; Red Blood Cells to carry ______; White Blood cells to protect the body from disease and _________ to help blood clot. away platelets towardscapillaries plasma oxygen muscular

21. Describe the order of blood flow through the heart beginning with veins You can use your notes!

22. 1. The overall function of the circulatory system is A. Gas exchange B. Transportation C. Blood production D. Clotting

23. 2. The ___________ is the main organ of the circulatory system A. Heart B. Blood Vessels C. Blood D. Lungs

24. 3. The circuit that carries blood to and from all the cells is the A. Pulmonary Circulation B. Coronary Circulation C. Blood Circulation D. Systemic Circulation

25. 4. The circuit that carries blood to and from the lungs is the A. Pulmonary Circulation B. Coronary Circulation C. Blood Circulation D. Systemic Circulation

26. 5. The circuit that carries the blood to and from the heart itself A. Pulmonary Circulation B. Coronary Circulation C. Blood Circulation D. Systemic Circulation

27. 6. The “plumbing” of the circulatory system is the A. Heart B. Lungs C. Blood D. Blood Vessels

28. 7. The arteries carry blood A. Within the heart B. Away from the heart C. Toward the heart D. Oxygen poor blood

29. 8. _______ join arteries and veins A. Arterioles B. Venules C. Capillaries D. Blood

30. 9. The arteries are carrying A. Oxygen poor blood B. Oxygen rich blood C. Waste rich blood D. Carbon dioxide rich blood

31. 10. The ________ side of the heart deals with oxygen poor blood A. Right B. Left

32. 11. The oxygen poor blood enters the heart through A. Vena Cava's B. Pulmonary arteries C. Pulmonary Veins D. Aorta

33. 12. The __________ pump blood out of the heart A. Aorta B. Pulmonary artery C. Atria D. Ventricles

34. 13. The largest of the three circuits is the A. Pulmonary B. Coronary C. Systemic

35. 14. Oxygen rich blood exits the lungs and enters A. Right atria B. Left atria C. Right ventricle D. Left ventricle

36. 15. The oxygen rich blood exits the heart through the A. Left atria B. Pulmonary Artery C. Aorta D. Coronary Artery

37. 16. The oxygen poor blood leaves the right ventricle through A. Left atria B. Pulmonary Artery C. Aorta D. Coronary Artery

38. 17. Gas exchange occurs in the A. Heart B. Aorta C. Superior Vena Cava's D. Lungs

39. 18. The superior Vena Cava is located A. Above the heart B. Below the heart

40. 19. Blood travels in one direction due to A. Blood flow B. Blood vessels C. The heart D. Valves

41. 20. How many chambers are located in the heart A. One B. Two C. Three D. Four

42. 21. The top chambers are called A. Ventricles B. Atria

43. 22. The bottom chambers are called A. Ventricles B. Atria

44. 23. What prevents the blood form mixing inside the heart?

45. 24. How does material enter and exit the blood vessels?

46. 25. Which answer shows the correct order of blood flow A. Vena cava's, r. ventricle, r. atria, pulmonary artery B. Vena cavas, l. atria, l. ventricle, pulmonary artery C. Vena cavas, r. atria, r. ventricle, pulmonary artery D. Vena cava's, aorta, pulmonary artery