Circulation&Respir_34&37

Circulation&Respir_34&37 - Circulation...

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Chapter 34 & 37
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Cardiovascular & Respiratory Systems
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Outline Cardiovascular system overview Circulatory systems Human cardiovascular system Blood path, heart function, blood vessels, blood Respiratory system Human respiratory Airways, lungs, gas exchange
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Cardiovascular system Heart, vessels, fluid Transport system Gas exchange Hormones Regulate body temperature Makes ………?
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Circulatory Systems Open circulatory Pump, vascular, fluid Open space Low pressure, less efficient invertebrates Closed circulatory Pump, vascular, fluid= Cardiovascular system Closed space High pressure, more efficient Vertebrates
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Open circulatory
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Open circulatory
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Closed Circulatory Continuous flow Capillary beds anastomose
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Cardiovascular System 3 main components: Pump- heart Vascular- blood vessels Fluid- blood & components
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Heart Muscular pump Uses pressure to circulate blood throughout body 4 chamber system Prevents mixing of o/d blood Valves- regulate flow
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Now That’s Some Muscle
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Heart Chambers Atria smaller Thinner walls Receive blood Ventricles Larger Thick walls Pump to body/lungs
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Heart Chambers
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Atrium to Ventricle out of Heart
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Heart valves Ensure 1 way flow Atrioventricular valves Av valves Open when heart relaxes Heart murmur Semilunar valves Right & left Pulmonary & aortic Closed in relaxed state
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Heart valves
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Heart valves
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Papillary Muscle Anchors Valve
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Vascular components Tubes for transfer Vary in size Arteries- oxygenated blood Arterioles capillaries Veins- deoxygenated blood Venuoles capillaries
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Vascular system
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Arteries vs veins Arterial system Away from heart Typ oxygenated (pulmonary artery) High pressure Thicker walls Smooth muscle elastic Veins To heart Typ deoxygenated (pulmonary vein) Low pressure Thinner walls, wider vessels (resevoir) Less smooth muscle Valves & surrounding body muscle
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Gas exchange Occurs at capillaries via blood flow Vital organs constant supply Brain, heart, kidneys, liver Non-vital organs- on demand supply Fight/flight Rest/digest
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CApillaries Exchange materials with tissues by diffusion
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Capillaries are like sieves
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veins
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Veins Have Valves
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This note was uploaded on 12/12/2011 for the course BIO 10 taught by Professor Staff during the Fall '11 term at Mesa CC.

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Circulation&Respir_34&37 - Circulation...

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