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Who wrote the book of love? An introduction to your cardiovascular system.

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Presentation on theme: "Who wrote the book of love? An introduction to your cardiovascular system."— Presentation transcript:

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2 Who wrote the book of love? An introduction to your cardiovascular system

3 Functions of the CV System »Carries needed substances to cells »Carries waste products away from cells »Carries needed substances to cells »Carries waste products away from cells

4 What does the CV system transport? »Carried by blood »Oxygen from lungs to body cells »Sugar to cells to produce energy »Waste Products »Picks up CO 2 waste from cells »Carries to the lungs to be exhaled »Disease Fighters »Transports cells that attack disease- causing microorganisms »Carried by blood »Oxygen from lungs to body cells »Sugar to cells to produce energy »Waste Products »Picks up CO 2 waste from cells »Carries to the lungs to be exhaled »Disease Fighters »Transports cells that attack disease- causing microorganisms

5 The Heart »A hollow, muscular organ that pumps blood throughout the body »About the size of your fist, center of chest »When the heart beats, blood is pushed through blood vessels »A hollow, muscular organ that pumps blood throughout the body »About the size of your fist, center of chest »When the heart beats, blood is pushed through blood vessels

6 The Heart’s Structure »Atrium: Upper Chamber »Receives blood that comes into the heart »Ventricle: Lower Chamber »Pumps blood out of heart »Valves: Flaps of tissue that prevent blood from flowing backward. »Atrium: Upper Chamber »Receives blood that comes into the heart »Ventricle: Lower Chamber »Pumps blood out of heart »Valves: Flaps of tissue that prevent blood from flowing backward.

7 How the Heart Works »2 phases »Relaxed: when heart relaxes it fills with blood. »Contracts: when heart contracts if pumps blood forward »2 phases »Relaxed: when heart relaxes it fills with blood. »Contracts: when heart contracts if pumps blood forward

8 Vessels »After leaving the heart, blood travels in vessels through the body. »3 kinds of vessels 1.Arteries: blood carried away from heart. 2.Capillaries: tiny vessels where substances are exchanged between blood and body cells. 3.Veins: carry blood back to the heart. »After leaving the heart, blood travels in vessels through the body. »3 kinds of vessels 1.Arteries: blood carried away from heart. 2.Capillaries: tiny vessels where substances are exchanged between blood and body cells. 3.Veins: carry blood back to the heart.

9 Where Does the Blood Go? »2 loops »Loop One: »To the lungs and back to the heart »Loop Two: »To the body and back to the heart »2 loops »Loop One: »To the lungs and back to the heart »Loop Two: »To the body and back to the heart

10 The Blood’s Winding Road »The average human has about 60,000 miles of blood vessels in their body.

11 Blood »Made up of 4 components 1.Plasma 2.Red Blood Cells 3.White Blood Cells 4.Platelets »Made up of 4 components 1.Plasma 2.Red Blood Cells 3.White Blood Cells 4.Platelets

12 Plasma »Carries molecules that come from the break-down of digested food. »About 10% of plasma »Water »About 90% of plasma »Carries molecules that come from the break-down of digested food. »About 10% of plasma »Water »About 90% of plasma

13 Red Blood Cells »Produced in bone marrow »Take up oxygen in the lungs and deliver it to cells in the body. »Made of mostly hemoglobin »Oxygen carrier »Produced in bone marrow »Take up oxygen in the lungs and deliver it to cells in the body. »Made of mostly hemoglobin »Oxygen carrier

14 White Blood Cells »Produced in bone marrow »The body’s disease fighters »WBC’s fewer in number than RBC’s »Produced in bone marrow »The body’s disease fighters »WBC’s fewer in number than RBC’s

15 Platelets »Cell fragments that play an important part in forming blood clots. »Heal wounds »Helps prevent infection and loss of blood. »Cell fragments that play an important part in forming blood clots. »Heal wounds »Helps prevent infection and loss of blood.

16 Blood Types »Four different types: »A, B, AB, and O »Type determined by markers on the RBC’s »Universal Donor: Type O »Universal Receiver: Type AB »Four different types: »A, B, AB, and O »Type determined by markers on the RBC’s »Universal Donor: Type O »Universal Receiver: Type AB

17 Cardiovascular Health »CV Disease »Atherosclerosis: artery wall thickens »May lead to heart attack »Heart Attack: when blood flow to part of the heart is blocked. »CV Disease »Atherosclerosis: artery wall thickens »May lead to heart attack »Heart Attack: when blood flow to part of the heart is blocked.

18 Hypertension »High blood pressure »Can damage heart and arteries »High blood pressure »Can damage heart and arteries

19 Staying Healthy »Regular exercise »Balance Diet »Avoid Smoking »Regular exercise »Balance Diet »Avoid Smoking


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