Thursday, August 11, 2016

Circulatory Systems

For this project I wanted to illustrate how blood flows through the system, and across animal kingdoms, particularly the efficiency that mammals (and birds) have evolved. In amphibians, possessing a 3-chambered heart, oxygen and deoxygenated blood mix in a single ventricle. Reptiles also have 3-chambered heart, however they possess muscular ridges within the ventricle so oxygenated and deoxygenated blood are partially separated. Mammals and birds (and crocodiles), possess 4-chambered hearts which successfully partition oxygenated blood from deoxygenated blood, the most efficient system. This animation should not imply that the entire blood volume does not circulate the entire body by a single heart pump. In fact, for humans, each "beat" pumps about 70 ml of blood of a 500 ml system. 

I created this GIF in Photoshop, a technique I showcased at the 2016 Guild of Natural Science Illustrators Conference. If you would like my "How To Create a GIF in Photoshop" tutorial, please send me an email. 


  1. Beautifully rendered. I projected this animation (with proper attribution) to my Organismal Biology class this week and have shared it with colleagues to do the same.

  2. I liked reading it. Thank you! I like the same things you may view more to find similar article.