Nervous System - www.livescience.com
http://lrrpublic.cli.det.nsw.edu.au/lrrSecure/Sites/LRRView/7700/documents/5657/5657/5657_05.htm
http://www.biologyreference.com/Se-T/Synaptic-Transmission.html#ixzz37k6JUT6y
Immune System - http://www.niaid.nih.gov/topics/immunesystem/Pages/overview.aspx
http://www.ehow.com/how-does_4962891_functions-as-defense-against-disease.html
http://www.tooloop.com/nervous-system-leg/
Digestive System - http://www.innerbody.com/image/digeov.html
https://www.smartlivingnetwork.com/digestive/b/mechanical-and-chemical-digestion/
Circulatory System- Read more : http://www.ehow.com/about_5379712_functions-human-circulatory-system.html
http://www.heartsite.com/html/the_heart.html
Skeletal System - http://www.innerbody.com/image/skelfov.html
Circulatory System - https://www.boundless.com/physiology/the-cardiovascular-system/circulation-and-heart-valves/systemic-and-pulmonary-circulation/
http://www.heartsite.com/html/the_heart.html
http://lrrpublic.cli.det.nsw.edu.au/lrrSecure/Sites/LRRView/7700/documents/5657/5657/5657_05.htm
http://www.biologyreference.com/Se-T/Synaptic-Transmission.html#ixzz37k6JUT6y
Immune System - http://www.niaid.nih.gov/topics/immunesystem/Pages/overview.aspx
http://www.ehow.com/how-does_4962891_functions-as-defense-against-disease.html
http://www.tooloop.com/nervous-system-leg/
Digestive System - http://www.innerbody.com/image/digeov.html
https://www.smartlivingnetwork.com/digestive/b/mechanical-and-chemical-digestion/
Circulatory System- Read more : http://www.ehow.com/about_5379712_functions-human-circulatory-system.html
http://www.heartsite.com/html/the_heart.html
Skeletal System - http://www.innerbody.com/image/skelfov.html
Circulatory System - https://www.boundless.com/physiology/the-cardiovascular-system/circulation-and-heart-valves/systemic-and-pulmonary-circulation/
http://www.heartsite.com/html/the_heart.html