Bibliography

http://www.urmc.rochester.edu/Encyclopedia/Content.aspx?ContentTypeID=160&ContentID=34

http://www.nlm.nih.gov/medlineplus/ency/imagepages/19192.htm

http://faculty.ucc.edu/biology-potter/life_cycle_of_the_erythrocyte.htm

http://red111utoj.blogspot.com/2011/05/heart-diagram-labeled.html

http://www.patient.co.uk/diagram/lungs-alveoli-diagram

http://www.3dscience.com/3D_Images/Human_Anatomy/Respiratory/Alveoli/Alveoli.php