logging in or signing up evolution_of_circulatory systems in animalswindows2007 bwaters Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 53 Category: Science & Tech.. License: All Rights Reserved Like it (0) Dislike it (0) Added: August 19, 2010 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Slide 1: Evolution of Animal Circulatory Systems Brie Aliabadi BIOSC 20 Los Medanos College Slide 2: Which of the following is the circulatory system of a turtle?? Pre-quiz!!! Slide 3: Adaptations for… larger size greater complexity increased mobility/activity life on land Animal evolution thus far…. Slide 4: Multicellularity Symmetry,Tissues Bilateral Symmetry Coelom Segmentation Notocord Deuterostome,endoskeleton Body Cavity Thanks to the evolution of the circulatory system!!! Slide 5: Circulation…. Transport Highway! Respiratory System Endocrine System Digestive System Excretory System Immune System Circulatory System Body fluid/temp. stabilization : co-evolution w/ respiratory system no circulatory system open circulatory system closed circulatory system Increasing complexity in vertebrates Key events in the evolution of the circulatory system… : Transport via diffusion high S-V ratio organisms with few cell layers direct exchange w/ environment In the beginning…. No circulatory system!! : Diffusion inefficient! low S-V ratio…. more nutrients more O2 more waste Require more energy!! But … larger animals need more…. : most invertebrates heart + short vessels fluid: hemolymph pressure = slow animal less O2, nutrients needed bathes cells directly The open circulatory system pump hemocoel Pool of hemolymph surrounding organs : all vertebrates & cephalopod, annelid inverts. blood stays in vessels pressure = fast blood Trends… 1 circuit 2 separate increasing # chambers 1 2 atria 1 2 ventricles The closed circulatory system : H2O = buoyancy less E, O2 needed 1 atrium, 1 ventricle FISH…. 1 circuit , 2 chambers …and with that 1st breath of air… : 2 atria 1 ventricle AMPHIBIANS …. 2 circuits , 3 chambers : 2 atria 1 partially divided ventricle helps separate O2’d & de-O2’d blood division more advanced in crocs! REPTILES…. 2 circuits , 3.5 chambers : highest E demand 2 atria 2 ventricles O2’d & de-O2’d blood completely separate Mammals & Birds…. 2 circuits , 4 chambers Slide 15: Which of the following is the circulatory system of a turtle?? Pre-quiz!!! Slide 16: http://www.nsf.gov/news/news_summ.jsp?org=NSF&cntn_id=115520&preview=false You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
evolution_of_circulatory systems in animalswindows2007 bwaters Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 53 Category: Science & Tech.. License: All Rights Reserved Like it (0) Dislike it (0) Added: August 19, 2010 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Slide 1: Evolution of Animal Circulatory Systems Brie Aliabadi BIOSC 20 Los Medanos College Slide 2: Which of the following is the circulatory system of a turtle?? Pre-quiz!!! Slide 3: Adaptations for… larger size greater complexity increased mobility/activity life on land Animal evolution thus far…. Slide 4: Multicellularity Symmetry,Tissues Bilateral Symmetry Coelom Segmentation Notocord Deuterostome,endoskeleton Body Cavity Thanks to the evolution of the circulatory system!!! Slide 5: Circulation…. Transport Highway! Respiratory System Endocrine System Digestive System Excretory System Immune System Circulatory System Body fluid/temp. stabilization : co-evolution w/ respiratory system no circulatory system open circulatory system closed circulatory system Increasing complexity in vertebrates Key events in the evolution of the circulatory system… : Transport via diffusion high S-V ratio organisms with few cell layers direct exchange w/ environment In the beginning…. No circulatory system!! : Diffusion inefficient! low S-V ratio…. more nutrients more O2 more waste Require more energy!! But … larger animals need more…. : most invertebrates heart + short vessels fluid: hemolymph pressure = slow animal less O2, nutrients needed bathes cells directly The open circulatory system pump hemocoel Pool of hemolymph surrounding organs : all vertebrates & cephalopod, annelid inverts. blood stays in vessels pressure = fast blood Trends… 1 circuit 2 separate increasing # chambers 1 2 atria 1 2 ventricles The closed circulatory system : H2O = buoyancy less E, O2 needed 1 atrium, 1 ventricle FISH…. 1 circuit , 2 chambers …and with that 1st breath of air… : 2 atria 1 ventricle AMPHIBIANS …. 2 circuits , 3 chambers : 2 atria 1 partially divided ventricle helps separate O2’d & de-O2’d blood division more advanced in crocs! REPTILES…. 2 circuits , 3.5 chambers : highest E demand 2 atria 2 ventricles O2’d & de-O2’d blood completely separate Mammals & Birds…. 2 circuits , 4 chambers Slide 15: Which of the following is the circulatory system of a turtle?? Pre-quiz!!! Slide 16: http://www.nsf.gov/news/news_summ.jsp?org=NSF&cntn_id=115520&preview=false