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nucleus
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Nucleus
The video thumbnail image shows an illustration of an animal cell next to a photo of a whale swimming in the oean.
How Are Plant Cells Different from Animal Cells?
Fluorescent confocal image of HeLa cells with green microtubules outlining cell shapes, red mitochondria, and blue nuclei. plant cells and tissues Cutaway illustration of a eukaryotic animal cell showing labeled internal structures, including the nucleus, nucleolus, mitochondria, endoplasmic reticulum, Golgi apparatus, and other organelles. Illustration comparing three cell types: a round animal cell and an irregularly shaped plant cell, both showing labeled organelles, and an elongated bacteria cell with labeled structures such as flagella and capsule. Side-by-side labeled diagrams of a typical animal cell and a plant cell, showing internal structures such as nucleus, mitochondrion, endoplasmic reticulum, and unique features like chloroplasts and cell wall in the plant cell. Cutaway illustration of a plant cell showing labeled internal structures including the nucleus, nucleolus, chloroplast, mitochondrion, vacuole, endoplasmic reticulum, ribosomes, Golgi apparatus, cell wall, and other key organelles.
How different parts of a cell interact
Quizzes
Mechanism of cellular autophagy, illustration for Nobel Prize Award in Medicine 2016. 3D illustration showing fusion of lysosome with autophagosome containing microbes and molecules.
Parts of a Cell Quiz
Related Questions

nucleus: References & Edit History

Article Contributors

Primary Contributors

  • The Editors of Encyclopaedia Britannica
    Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Invalidated site: National Center for Biotechnology Information - PubMed Central - The Nucleus Introduced. Sep 19, 2026
Article thoroughly revised and updated. Apr 17, 2026
Add new Web site: CellPress - Cell - The Nucleus: Express Yourself. Feb 16, 2026
Add new Web site: OpenStax - Anatomy and Physiology 2e - The Nucleus and DNA Replication. Jun 19, 2025
Add new Web site: University of Dundee - Evolution of the nucleus (PDF). Feb 10, 2025
Add new Web site: Mustansiriyah University - Nucleus (PDF). Dec 16, 2024
Media added. Aug 23, 2024
Media added. Feb 28, 2024
Add new Web site: The University of Hawaiʻi Pressbooks - Anatomy & Physiology - The Nucleus and DNA Replication. Feb 16, 2024
Add new Web site: Oregon State University Pressbooks - Anatomy and Physiology 2e - The Nucleus and DNA Replication. Dec 03, 2023
Add new Web site: Frontiers - Manifold Routes to a Nucleus. May 16, 2023
Added a cross-reference to nucleolus. Mar 14, 2023
Add new Web site: Biology LibreTexts - The Nucleus. Aug 23, 2022
Added information on the role of the nucleus as an information center for the cell. Sep 11, 2019
Corrected display issue. Mar 01, 2019
Add new Web site: Molecular Expressions - Introduction to Cell and Virus Structure - The Cell Nucleus. Apr 21, 2016
Add new Web site: National Center for Biotechnology Information - PubMed Central - The Nucleus Introduced. Apr 21, 2016
Add new Web site: Khan Academy - Biology - Nucleus and Ribosomes. Apr 21, 2016
Add new Web site: Rader's Biology4Kids.com - Cell Nucleus - Commanding the Cell. Sep 14, 2015
Add new Web site: Buzzle.com - Nucleus Function. Apr 17, 2014
Article added to new online database. Jul 20, 1998
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