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Cardiovascular System

Cardiovascular System. Chapter 2.1 . Circulatory System . Carries blood throughout the body Includes: Heart Blood Veins Capillaries Arteries. The Heart. Is an organ A Pump 4 chambers Made of mostly cardiac muscle ~ the size of your fist almost in the center of your chest.

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Cardiovascular System

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  1. Cardiovascular System Chapter 2.1

  2. Circulatory System • Carries blood throughout the body • Includes: • Heart • Blood • Veins • Capillaries • Arteries

  3. The Heart • Is an organ • A Pump • 4 chambers • Made of mostly cardiac muscle • ~ the size of your fist • almost in the center of your chest.

  4. Heart Chambers • The Atriums are the upper chambers… • They send blood to the ventricles Left Atrium Right Atrium Right Ventricle Left Ventricle • The Ventricles (work horse) are the lower chambers • Send blood out of the heart

  5. Right side of the Heart • Oxygen-poor blood from the body comes into the right atrium • Passes through the tricuspid valve to the right ventricle • Passes to the pulmonary arteries and onto the lungs. What do you think the valves are for?

  6. Left side of the Heart • Oxygen-rich blood comes in from the lungs to the left atrium • Passes to the left ventricle through the bicuspid valve • Passes out to the body through the aorta.

  7. Blood vessels Arteries Arterioles capillaries venules veins

  8. Arteries • A for Away • Arteries take blood away from the heart. • Thick elastic walls lined with smooth muscles. • Heartbeat pumps blood at a high pressure • Called Blood Pressure • Stretch to withstand this pressure • Called pulse

  9. Ventricles and Arteries: Pumping Blood from your Heart • Blood leaves the Heart through two ARTERIES. Artery Artery Right Ventricle Left Ventricle • The Heart pumps blood through Arteries to the Lungs to collect Oxygen. • The Heart pumps blood through Arteries to supply Oxygen to the Body.

  10. Capillaries • Exchange site between body and blood. • Ex. nutrients, O2, CO2, and waste • Very thin=cells travel through in single file.

  11. Veins • Return blood to the heart. • Need valves to keep blood flowing in one direction.

  12. Atriums and Veins: How Blood gets into your Heart • Blood enters the Heart through two VEINS. Veins Left Atrium Right Atrium • The Lungs send blood with Oxygen in it through veins to the Heart. • The Body sends blood with no Oxygen in it through veins to the Heart.

  13. Two types of Circulation • Pulmonary Circulation • Circulation between heart and lungs • Systemic Circulation • Circulation between heart and body

  14. Cardiovascular Problems • Atherosclerosis • When cholesterol builds up in blood vessels • High Blood Pressure (hypertension) • Abnormally high blood pressure • Stroke • When a blood vessel in the brain becomes clogged or ruptures • Heart Attack • When heart muscles cells die • Heart Failure • When heart cannot pump enough blood to the body

  15. Structure of Your Heart: Summary Blood from Veins into Heart From Lungs From Body Right Atrium Left Atrium Tricuspid Bicuspid Right Ventricle Left Ventricle To Lungs To Body Blood to Arteries out of Heart

  16. Heart Structure • Aorta • Superior Vena Cava • Pulmonary Artery • Pulmonary Vein • Right Atrium • Tricuspid • Right Ventricle • Inferior Vena Cava • Pulmonary Artery • Pulmonary Vein • Left Atrium • Bicuspid • Aortic Semilunar Valve • Left Ventricle • Descending Aorta ******Parts to ADD 16. Septum 17. Pulmonary Semilunar valve 18. Myocardium 17. 16. 18.

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