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Chapter_42_to_post - Chapter 42 Circulation Parts of...

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Chapter 42: Circulation
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Parts of circulatory systems 1. fluid that circulates (blood) 2. channel (vessels) that fluid circulates through 3. pump (heart) to keep fluid moving
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Types of circulatory systems 1. open circulatory systems 2. closed circulatory systems
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Fig 42.3
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Functions of the vertebrate circulatory system 1. carry oxygen, nutrients, and waste 2. distribute hormones 3. regulate body temperature 4. prevent blood loss 5. defend against disease
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Vertebrate Hearts 2 chambers – fish (fig. 42.4) 3 chambers – amphibians, reptiles 4 chambers – birds, mammals • chambers are atria or ventricles
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4-chambered heart 2 chambers for deoxygenated blood 2 chambers for oxygenated blood
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4-chambered heart 4 one-way valves 2 between atria and ventricles 2 between ventricles and blood vessels
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Blood 1. Plasma a. proteins and hormones b. nutrients c. gases d. ions e. wastes
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Blood 1. Plasma 2. Cells
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Blood 1. Plasma 2. Cells 1. red blood cells
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Blood 1. Plasma 2. Cells a. red blood cells i. no nuclei
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Chapter_42_to_post - Chapter 42 Circulation Parts of...

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