Respiratory System=www.123rf.com/photo_20185482_illustration-of-the-female-human-respiratory-system.html
Circulatory System= www.ashlandschools.org/morgan_cottle/body/circulatory.htm
Skeletal System-www.marshaclarkeermt.com/the-skeletal-system-did-you-know/
Digestive System =www.abpischools.org.uk/page/modules/heartandcirculation/heart3.cfm