This site illustrates different parts of a plant and animal cell. The student may then drag and drop labels to the correct cell part.

Describes the structure and functions of a cell nucleus.

Describes the structure and functions of the membrane surrounding a cell nucleus.

Discusses the discovery of the cell nucleus, its location, size, structure, composition, and functions.

Explains the functions of the nucleus in a cell.

The parts of a cell nucleus are described along with a list of the functions of a cell nucleus.

Provides a definition and explanation of fission, the splitting of a heavy nucleus into two roughly equal parts, and fusion, the process where two nuclei combine together to form a larger nucleus.

Explains cell structure and function and describes the parts of a cell.

Brief description of all the organelles.

Short, but excellent description of nucleolus.