Work Cited

http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/thyroid/calcitonin.html

http://www.ncbi.nlm.nih.gov/books/NBK28/

http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/thyroid/physio.html

http://www.yourhormones.info/hormones/thyroxine.aspx

http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/thyroid/control.html

http://www.mayoclinic.org/diseases-conditions/hypothyroidism/basics/causes/con-20021179

http://www.mayoclinic.org/diseases-conditions/hyperthyroidism/basics/causes/con-20020986

http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/thyroid/anatomy.html

http://www.britannica.com/EBchecked/topic/594629/thyroid-gland