Chapter 23

Chapter 23 - Slide 1 Chapter23 Circulation Slide 2 Distributenutrients Slide 3 Capillaries Capillary Nuclei of smooth muscle cells LM 700 Red blood

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Slide 1 Chapter 23: Circulation
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Slide 2 Functions of the circulatory system Carry gases between lungs and tissues Carry gases between lungs and tissues Distribute nutrients Distribute nutrients Convey wastes to disposal sites Convey wastes to disposal sites
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Slide 3 Capillary Red blood cell Nuclei of smooth muscle cells L M 7 0 × Capillaries
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Slide 4 Capillaries (cont.) Capillary Tissue cell Diffusion of molecules Interstitial fluid
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Slide 5 Mouth Circular canal Cnidarians: no true Circ. System
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Slide 6 True Circulatory Systems There are two types of true circulatory systems: There are two types of true circulatory systems: 1. 1. Open – vessels are open ended and there is no  Open – vessels are open ended and there is no  difference between blood and interstitial fluid difference between blood and interstitial fluid 2. 2. Closed – blood is confined to vessels and  Closed – blood is confined to vessels and  separate from interstitial fluid separate from interstitial fluid
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Slide 7 1.  Open circulatory system Pores Tubular heart
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Slide 8 2.  Closed circulatory system Arteriole Artery (O 2 -rich blood) Capillary beds Venule Vein Heart Atrium Ventricle Artery (O 2 -poor blood) Gill capillaries
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Chapter 23 - Slide 1 Chapter23 Circulation Slide 2 Distributenutrients Slide 3 Capillaries Capillary Nuclei of smooth muscle cells LM 700 Red blood

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