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Chapter 32 Circulation

CV Comparison Lab. Chapter 32 Circulation. LInks for CV Evolution Lab: Circulatory System III: The Heart http://education-portal.com/academy/lesson/circulatory-system-iii-the-heart.html#lesson You Tube Videos http://www.youtube.com/watch?v=6TCT5zRX0lU&list=PL89C59A3264EA05E1.

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Chapter 32 Circulation

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  1. CV Comparison Lab Chapter 32 Circulation LInks for CV Evolution Lab:Circulatory System III: The Heart http://education-portal.com/academy/lesson/circulatory-system-iii-the-heart.html#lessonYou Tube Videos http://www.youtube.com/watch?v=6TCT5zRX0lU&list=PL89C59A3264EA05E1 Mills AP Bio 2013

  2. Describe two invertebrates and six vertebrate of increasing complexity. Describe: How each system works. What are the advantages of the system to the organism? Include labeled color pictures for each. Mills AP Bio 2013

  3. Of Animals Mills AP Bio 2013

  4. Chapter 32 CirculationTransport in Invertebrates Mills AP Bio 2013

  5. Chapter 32 CirculationTransport in Vertebrates • Comparison of Circulatory Pathways in Vertebrates • One circuit – single loop • Two circuit – double loop • 2 atria, single ventricle • 2 atria, 2 ventricle (right and left sides divided) (See next slide for better picture) Mills AP Bio 2013

  6. Chapter 32 CirculationTransport in Vertebrates Although only one ventricle, there is little mixing of blood. Some reptiles have a partial wall dividing ventricle. Crocodile has a heart like mammals and birds. Mills AP Bio 2013

  7. Chapter 32 CirculationTransport in Vertebrates Mills AP Bio 2013

  8. Chapter 32 CirculationTransport in Vertebrates Shape of ventricles minimizes mixing of blood: Oxygenated blood from LA exits to ventricle and enters carotids to go to brain. Deoxygenated blood from RA exits to ventricle to pulmocutaneous vessels to go to skin and lungs. Mixed blood from both artia exits ventricles to aortic arch to go to rest of body. Mills AP Bio 2013

  9. Unique Crocodile Heart • http://www.abc.net.au/science/news/stories/s167223.htm Special connective tissue valve in right ventricle can close off blood going to lungs and shuntit to the body. Crocodile can stay under water for a couple of hours. (We will come back to this later in PPT) Mills AP Bio 2013

  10. Unusual Adaptations When under water, blood is diverted around the lungs. Blood exits right ventricle into the “left” (see next slide) aorta (yellow arrow), which then joins the “right” aorta. The pulmonary trunk (white arrow) is closed off by an evolutionarily unique “cog tooth” valve of connective tissue. Cog tooth valve is made of connective tissue knobs and responds to adrenalin. Normal valves are just passive flaps. When diving there is more adrenalin and this causes the cog teeth to close. • Crocodile has unique solution • How can the air breathing croc stay underwater for hours at a time? L Aorta-To posterior body R Aorta-To brain and small amt to posterior body To lungs http://www.abc.net.au/science/news/space/SpaceRepublish_167223.htm See also: www.palaeos.com/.../Units/290Crocs/290.100.html Mills AP Bio 2013

  11. When diving, blood exits ventricle here (left aorta – named after bend), and pulmonary trunk closes. Valve open to left aorta. Valve closed to left aorta http://www.auburn.edu/academic/classes/zy/0301/Topic12/Topic12.html Mills AP Bio 2013

  12. Mills AP Bio 2013

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