This module focuses on cell structure and how the organelles function together to form the smallest unit of life. The cell theory is also discussed along with the basics features of the cell. Site also includes an interactive practice...

This 11-page Biology course handout gives a detailed explanation of cell structure, supplemented by many illustrations.

The following site provides information regarding the process of cell growth and division.

An illustrated presentation introducing the structure and function of the cell, including the two different types of cells: prokaryotic and eukaryotic.

Explanation of when the cell was discovered and how ideas have evolved into modern cell theory. Discover the cell structures and their functions.

Evidence in support of endosymbiosis to show the evolution of organelles within cells.

An excerpt from the eBook, "Essentials of Cell Biology, Unit 1.2." Text and illustrations allow for deeper understanding of cells.

The parts and functions of the mitochondria are described as well as the many illnesses that can result from mitochondrial dysfunction.

This interactive feature describes some of the most important structures and functions of the cell membrane.

This site features a clear picture of the plant cell with a concise explanation of its key parts and their functions.

This article examines the basic principles of how cells communicate with one another using different kinds of short- and long-range signaling.

This is a thorough site which contains a glossary of plant/animal cell anatomy terms. Diagrams of both cells are included along with worksheets to label.

Learn how cells use checkpoints to regulate the cell cycle. This article provides an overview of cell cycle control, outlining the factors that influence a cell's decision to pause or progress at each checkpoint.

Learn about the hormones released by the pituitary gland, their target cells, and their principal actions, as well as the structure and function of the hypothalamus.

Describes the structure of ribosomes and their function of synthesizing proteins within a cell.

Essay on the history of our knowledge of cells and the development of the cell theory.

Learn about the different types of intercellular junctions, including plasmodesmata, tight junctions, gap junctions, and desmosomes.

A good description of the structure and function of the nucleus.

A really nice web page devoted to the structure of DNA. Simple information but nice use of graphics to show the molecule. Uses the CHIME plug-in to show the 3-D nature of the helix.

In-depth information on all stages of cell biology as well as lesson ideas, tutorial diagrams, and online labs.

Article looks at different types of receptors and ligands, seeing how they interact to turn information from outside the cell into a change inside the cell.

The process of cellular differentiation leads cells to assume their final morphology and physiology - learn here all about this process.

Students determine which cell organelles have a similar function to different places in a city.

Discusses the differences between endothelial and epithelial cells, including where they are found in the human body, their function, and their structure.