University of California
Organic Structures:the Architecture of Life
Article discusses how objects in nature are held together through balanced forces. Scroll midway down to find info on microtubules and microfilaments. Links to excellent electron micrographs.
Khan Academy
Khan Academy: The Cytoskeleton
There are three types of protein fibers in the cytoskeleton: microfilaments, intermediate filaments, and microtubules. This resource examines each type of filament, as well as some specialized structures: flagella, cilia, and centrosomes.
Khan Academy
Khan Academy: The Extracellular Matrix and Cell Wall
Article examines the external structures of the extracellular matrix and the cell wall and looks at the role they play in different cell types.
BiologyWise
Biology Wise: Rough Endoplasmic Reticulum and Cell Metabolism
The characteristics of the rough endoplasmic reticulum are described and its role in protein synthesis, including creating proteins, folding them, transporting them, and checking them for quality.
BiologyWise
Biology Wise: Plant Cell Organelles
Explains how plant and animal cells are different and describes the organelles in a plant cell.
Biology 4 kids
Biology4 Kids: Microfilaments Stringy Proteins
A short, informational text piece which explains the structure and function of microfilaments inside a cell.
Khan Academy
Khan Academy: Cell Cell Junctions
Learn about the different types of intercellular junctions, including plasmodesmata, tight junctions, gap junctions, and desmosomes.
Biology 4 kids
Biology4 Kids: Microtubules Thick Protein Tubes
A short, informational article which explains the structure and function of microtubules inside a cell.
University of Hamburg
University of Hamburg: Microtubules
Discussion of the size and structure of the microtubules in a cell. Links within the text take students to images and schematics.