Cold Spring Harbor Laboratory
Dolan Dna Learning Center: Dna Molecule: How Dna Is Packaged Basic
See how our DNA is tightly packed up so that six feet of this long molecule fits into the microscopic nucleus of every cell. [1:30]
University of Kansas Medical Center
University of Kansas Medical Center: Endocrine System
Investigate this collection of microscopic samples of tissues and cells from the endocrine system.
Microscopy UK
Microscopy Uk: Bacteria
Discover the world of bacteria from their importance in the development of more complex life forms to how they use flagella to move. Highlights the characteristics of cyanobacteria.
Soft Schools
Soft Schools: Protists Quiz
Take an interactive quiz over protists. After completing the quiz, check your score, and then revisit any incorrect question for further review.
Soft Schools
Soft Schools: Protists Quiz Ii
Take this interactive, multiple-choice quiz over protists, then review your score and any missed questions at the end.
McGraw Hill
Mc Graw Hill: Neurons
Introduction to neuron structure, function, and classification. Provides simple diagrams of neurons conducting an impulse and microscope images of nerve cells.
Cosmo Learning
Cosmo Learning: Video: Capillaries
A video showing and explaining that capillaries are microscopic blood vessels that are one cell layer thick. [0:13]