CK-12 Foundation
Ck 12: Senses
[Free Registration/Login may be required to access all resource tools.] The following online tutorial explains how sensory stimuli are perceived and interpreted.
CK-12 Foundation
Ck 12: Biology: Senses
[Free Registration/Login may be required to access all resource tools.] Discusses how sensory stimuli are perceived and interpreted.
Treehut
Suzy's World: Touch
At this site find out how you can feel hot and cold and try this experiment using your sensory nerves.
Science4Fun
Science4 Fun: Nervous System
Provides a discussion of the two parts of the nervous system: peripheral nervous system, and central nervous system. Also illustrates how signals travel through nerves.