CK-12 Foundation
Ck 12: Cytoplasm and Cytoskeletons
[Free Registration/Login may be required to access all resource tools.] Tutorial provides an overview of the roles and functions of the cytoplasm and cytoskeleton.
Other
Nexperion: Filament Systems
Get a microscopic look at the filament system through special probes and instrumentation. Site shows pictures of the actin fil-a-ments, inter-me-di-ate fil-a-ments, and micro-tubules using the special probes.