http://sln.fi.edu/biosci/heart.html
The Heart: An online exploration by the Franklin Institute
Great site for teachers and students
http://www.learnersonline.com/lessons/archive2001/week28/
Learners Online - "Artificial Heart Technology"
This site has weekly online lessons on Health and Technology
http://www.learnersonline.com/lessons/archive2001/week25/index.htm
Learners Online - "Spinal Cord Injuries" and the Central Nervous System
http://www.proteacher.com/110025.shtml
Lots of links for information on the human body
http://kingscoe.org/specialedhelp/MSAT%20SCIENCE/Circulatory System.htm
Great information on the heart, but only looks at the pacemaker in terms of technology
Great site with tons of links for all human body systems!
http://www.si.edu/nsrc/stcms/humanbod.htm