REFERENCES
Bird
Codd, J. R., P. L. Manning, M. A. Norell, and S. F. Perry. "Avian-like Breathing Mechanics in Maniraptoran Dinosaurs." Proceedings of the Royal Society B: Biological Sciences 275.1631 (2008): 157-61. Web. <http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2596187/>.
O'connor, Patrick M., and Leon P. A. M. Claessens. "Basic Avian Pulmonary Design and Flow-through Ventilation in Non-avian Theropod Dinosaurs." Nature 436.7048 (2005): 253-56. Web. <http://www.nature.com/nature/journal/v436/n7048/abs/nature03716.html>.
Human
"Colouring pages of Alveoli", Web. 12 Dec 2015. <http://freecoloringpages.co.uk/?q=alveoli>
"MCAT Human Body Systems", Sabali co. Web. 12 Dec 2015. <http://www.aboutthemcat.org/human-body-systems/respiratory-system.php>
"Organs of the Body", Anatomy. Web. 12 Dec 2015. <http://respiratorysystem.organsofthebody.com/>
Frog
"Frog Respiration." Frog Respiration. Brown.edu, Web. 16 Dec. 2015.<http://www.brown.edu/Departments/Engineering/Courses/En123/MuscleExp/Frog%20Respiration.htm>
"Frog." Animal Respiration. Web. 16 Dec. 2015.<http://animals.mom.me/respiration-frog-vs-tadpole-3518.html>
"How Do Frogs Breathe During Hibernation?" Animals. Web. 16 Dec. 2015. <http://animals.mom.me/frogs-breathe-during-hibernation-8483.html>
Fish
"Bony Fishes Anatomy & Physiology." SeaWorld Parks & Entertainment. SeaWorld Parks & Entertainment, n.d. Web. 14 Dec. 2015. <http://seaworld.org/en/animal-info/animal-infobooks/bony-fish/anatomy-and-physiology/>.
"Chordata-Fishes." Sharon-taxonomy2009-p3 -. WikiClassrooms, n.d. Web. 14 Dec. 2015. <https://sharon-taxonomy2009-p3.wikispaces.com/Chordata-Fishes>.
"Differences Between Sharks and Bony Fish: More Than Just The Skeleton." Shark Savers. WildAid, n.d. Web. 14 Dec. 2015. <http://www.sharksavers.org/en/education/biology/differences-between-sharks-and-bony-fish-more-than-just-a-skeleton/>.
Himme, Ben. "FISH - GAS EXCHANGE." Pathwayz. Learning Pathwayz Limited, n.d. Web. 14 Dec. 2015. <https://www.pathwayz.org/Tree/Plain/FISH+-GAS+EXCHANGE>.
Randall, David. "THE CONTROL OF RESPIRATION AND CIRCULATION IN FISH DURING EXERCISE AND HYPOXIA." The Journal of Experimental Biology (n.d.): n. pag. Jeb.biologists.org. Web. 14 Dec. 2015. <http://jeb.biologists.org/content/jexbio/100/1/275.full.pdf>.