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The Heart and Circulatory System; The Basic Functions.

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Presentation on theme: "The Heart and Circulatory System; The Basic Functions."— Presentation transcript:

1 The Heart and Circulatory System; The Basic Functions

2 What are the main parts of the Circulatory System?

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

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

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11 1.______________________ 2.______________________ 3.______________________ 4.______________________ 5.______________________ 6.______________________ 7.______________________ 8.______________________ 9.______________________ 10._____________________ 11._____________________ 12._____________________ 13._____________________ 14._____________________

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

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

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

15 Heart Beat The heart makes 2 sounds as it beats: The heart makes 2 sounds as it beats:“Lub-Dub” The sounds are caused by the closing of the valves 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. The valves are supported by tendons.

16 Chordae Tendinae

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

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

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

20 Human Body Project


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