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The Circulatory System

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Presentation on theme: "The Circulatory System"— Presentation transcript:

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 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 Collins I 4 lines Describe the heart !!

10 Agenda 1/4/12 ---Day 6 Review heart diagram Do more heart diagrams
Heart interactive Discuss Chapter 7 Test Circulatory system worksheet (HW)



13 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

14 3 Kinds of Circulation: Pulmonary circulation Coronary circulation
Systemic circulation

15 Pulmonary Circulation
Movement of blood from the heart, to the lungs, and back to the heart again

16 Pulmonary Circulation Pathway
1. The right Atria receives oxygen poor blood from the body. 2. blood moves to the right ventricle where it is pumped out to the lungs via pulmonary arteries 3. O₂ is exchanged for CO₂ 4. Oxygen rich blood now leaves lungs and returns to the heart

17 pulmonary.html

18 Systemic Circulation Supplies nourishment to all of the tissue located throughout the body , except for the heart and lungs THIS IS THE LARGEST PATHWAY OF THE CIRCULATORY SYSTEM!

19 Systemic Circulation Pathway
Oxygen rich blood returning from the lungs now enters the left atrium Moves through the valves to the left ventricle The left ventricle pumps the oxygen rich blood out the Aorta The blood is then carried from aorta to blood vessels delivering oxygen and nutrients to ALL tissues of the body Blood returns (oxygen poor) back to right atria


21 Coronary Circulation Coronary arteries branch immediately off the aorta and provide blood to the heart tissue



24 Hollow tubes that circulate your blood
Blood Vessels Hollow tubes that circulate your blood Arteries Veins Capillaries

25 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.

26 SSR First 10 minutes

27 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

28 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


30 Overview of Blood Vessels

31 Blood composition O₂ RBC CO₂ WBC Nutrients Platelets Antibodies
Plasma Other material Formed elements RBC WBC Platelets O₂ CO₂ Nutrients Antibodies Hormones

32 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)

33 Blood Hemoglobin carries CO2 also
CO2 is a waste product of cellular work 70% of CO2 combines with water The rest travels to the lungs

34 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.


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

37 illus/167i2.htm

38 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.

39 vccl/chpt7/plate.htm

40 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 muscular towards capillaries plasma oxygen platelets

41 Some Disorders and Diseases of the Circulatory System

42 DISORDERS ATHEROSCLEROSIS Fatty deposits called plaque
Builds up in walls of arteries Obstructs flow Also a risk if clot breaks free and blocks flow elsewhere

43 Disorders (cont) Hypertension High blood pressure
Hearts works harder than necessary Increases risk of heart attack or stroke

44 Disorders (cont) Heart Attack Atherosclerosis in coronary artery
Heart muscle begins to die Symptoms Nausea Shortness of breath Severe chest pain IMMEDIATE MEDICAL ATTENTION NECESSARY

45 Disorders (cont) Stroke
Blood clot gets stuck in blood vessels leading to brain Brain cells die due to lack of oxygen Or blood vessel burst Can lead to paralysis, loss of ability to speak death

46 Collins I 4 lines Describe the order of blood flow through the heart beginning with veins You can use your notes!

47 Agenda 1/6/12—Day 2 Heart model Heat dissection Review power point

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

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

50 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

51 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

52 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

72 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

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