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The Heart and Circulatory System; The Basic Functions

The Heart and Circulatory System; The Basic Functions. What are the main parts of the Circulatory System?. Coronary Arteries These provide the heart muscle with oxygen rich blood. What’s on the exterior of the heart?. The Heart.

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The Heart and Circulatory System; The Basic Functions

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  1. The Heart and Circulatory System; The Basic Functions

  2. What are the main parts of the Circulatory System?

  3. Coronary Arteries These provide the heart muscle with oxygen rich blood. What’s on the exterior of the heart?

  4. The Heart • Found in the thoracic cavity, between the lungs and slightly to the left. • It is the size of a large fist. • Contains 4 chambers • Atrium (right & left) • Ventricle (right & left) • It has 2 pumps: • Right side: Pulmonary Circulation (lungs) • Left side: Systemic Circulation (body)

  5. Pulmonary (LUNGS) Circulation Systemic (BODY) Circulation

  6. Pulmonary (LUNGS) Circulation The right side of the heart pumps deoxygenated blood to the lungs. The left side receives oxygenated blood.

  7. Systemic (BODY) Circulation The left side of the heart pumps oxygenated blood to the body. The right side of the heart receives deoxygenated blood. Reinforcement Video:

  8. Which side of the heart is larger? Why? The right side pumps blood to the lungs. The left side pumps blood to the entire body. So Which side will require more power? The left  so it is thicker & has more muscle

  9. Where does the blood flow?

  10. ______________________ • ______________________ • ______________________ • ______________________ • ______________________ • ______________________ • ______________________ • ______________________ • ______________________ • _____________________ • _____________________ • _____________________ • _____________________ • _____________________

  11. Aorta Pulmonary Arteries Superior Vena Cava Pulmonary Veins Right Atrium Right AV valve (tricuspid) Pulmonary Valve Right Ventricle Inferior Vena Cava 1 2 4 3 5 7 6 8 9

  12. Left Atrium Left AV Valve (bicuspid or mitral) Aortic Valve Left Ventricle Septum 10 11 12 13 14

  13. Arteries Carry oxygenated blood away from the  BUT The Pulmonary Arteries carry deoxygenated blood away from the  Veins Carry deoxygenated blood to the  BUT The Pulmonary Veins carry oxygenated blood to the  An Exception! Reinforcement Videos:

  14. Heart Beat • The heart makes 2 sounds as it beats: “Lub-Dub” • The sounds are caused by the closing of the valves • “Lub”  closing of both AV valves • “Dub”  closing of the aortic & pulmonary valves • The valves are supported by tendons.

  15. Chordae Tendinae

  16. Heart Rate(feel your pulse) • Heart Rate is thenumber of times  beats per minute • Average rate varies  age, gender, and health • ~70 beats/min • A healthier person has a larger heart and a slower heart rate

  17. Factors that can cause the  rate to speed up: Physical activity Emotions (fear, excitement) Chemicals (ex: adrenaline, tobacco)

  18. Synergy Textbook Work Functions of Blood Constituents: - READ pgs. 99 – 103 - Questions 1 – 4 pg. 119 The Anatomy of the Circulatory System: - Read pgs. 107 – 111 - Questions 5 – 7 pg. 120.

  19. Human Body Project

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