Presentation on theme: "The Heart and Circulatory System; The Basic Functions"— Presentation transcript:
1The Heart and Circulatory System; The Basic Functions
2What are the main parts of the Circulatory System?
3What’s on the exterior of the heart? Coronary ArteriesThese provide the heart muscle with oxygen rich blood.
4The HeartFound in the thoracic cavity, between the lungs and slightly to the left.It is the size of a large fist.Contains 4 chambersAtrium (right & left)Ventricle (right & left)It has 2 pumps:Right side: Pulmonary Circulation (lungs)Left side: Systemic Circulation (body)
6Pulmonary (LUNGS) Circulation The right side of the heart pumps deoxygenated blood to the lungs.The left side receives oxygenated blood.
7Systemic (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:
8Which 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
1310 11 12 13 14 Left Atrium Left AV Valve (bicuspid or mitral) Aortic ValveLeft VentricleSeptum1011121314
14An Exception! Arteries Carry oxygenated blood away from the BUT The Pulmonary Arteries carry deoxygenated blood away from the VeinsCarry deoxygenated blood to the BUTThe Pulmonary Veins carry oxygenated blood to the Reinforcement Videos:
15Heart 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 valvesThe valves are supported by tendons.
17Heart Rate (feel your pulse) Heart Rate is the number of times beats per minuteAverage rate varies age, gender, and health~70 beats/minA healthier person has a larger heart and a slower heart rate
18Factors that can cause the rate to speed up: Physical activityEmotions (fear, excitement)Chemicals (ex: adrenaline, tobacco)
19Synergy Textbook Work Functions of Blood Constituents: - READ pgs. 99 – 103- Questions 1 – 4 pg. 119The Anatomy of the Circulatory System:- Read pgs. 107 – 111- Questions 5 – 7 pg. 120.