nucleus: Quick Facts

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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.

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?

How different parts of a cell interact

Eukaryotic vs. Prokaryotic Cells: Key Differences Explained

Observe a living plant cell undergoing mitotic cell division recorded by time-lapse photography

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Topics

chromosome nuclear envelope nucleoplasm nuclear division nucleolus gene sex chromosome Why Are Chromosomes in Pairs?major histocompatibility complex telomere Golgi apparatus mitochondrion Nitroplast endoplasmic reticulum peroxisome hydrogenosome membrane ribosome lysosome intracellular fluid

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Key People

Brown, Robert

Robert Brown

Scottish botanist

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