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  2. Cell nucleus - Wikipedia

    en.wikipedia.org/wiki/Cell_nucleus

    Centrosome. Cell membrane. The cell nucleus (from Latin nucleus or nuculeus 'kernel, seed'; pl.: nuclei) is a membrane-bound organelle found in eukaryotic cells. Eukaryotic cells usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nuclei, and a few others including osteoclasts have many.

  3. Nucleolus - Wikipedia

    en.wikipedia.org/wiki/Nucleolus

    Nucleolus. The nucleolus (/ njuːˈkliːələs, ˌnjuːkliˈoʊləs /; pl.: nucleoli /- laɪ /) is the largest structure in the nucleus of eukaryotic cells. [1] It is best known as the site of ribosome biogenesis, which is the synthesis of ribosomes. The nucleolus also participates in the formation of signal recognition particles and plays a ...

  4. Nuclear envelope - Wikipedia

    en.wikipedia.org/wiki/Nuclear_envelope

    Nuclear envelope. The nuclear envelope, also known as the nuclear membrane, [1][a] is made up of two lipid bilayer membranes that in eukaryotic cells surround the nucleus, which encloses the genetic material. The nuclear envelope consists of two lipid bilayer membranes: an inner nuclear membrane and an outer nuclear membrane. [4]

  5. Nucleoplasm - Wikipedia

    en.wikipedia.org/wiki/Nucleoplasm

    The nucleoplasm, also known as karyoplasm, [1] is the type of protoplasm that makes up the cell nucleus, the most prominent organelle of the eukaryotic cell. It is enclosed by the nuclear envelope, also known as the nuclear membrane. [2] The nucleoplasm resembles the cytoplasm of a eukaryotic cell in that it is a gel-like substance found within ...

  6. Cell (biology) - Wikipedia

    en.wikipedia.org/wiki/Cell_(biology)

    The cell is the basic structural and functional unit of all forms of life. Every cell consists of cytoplasm enclosed within a membrane; many cells contain organelles, each with a specific function. The term comes from the Latin word cellula meaning 'small room'. Most cells are only visible under a microscope.

  7. Nucleus basalis - Wikipedia

    en.wikipedia.org/wiki/Nucleus_basalis

    In the human brain, the nucleus basalis, also known as the nucleus basalis of Meynert or nucleus basalis magnocellularis, is a group of neurons located mainly in the substantia innominata of the basal forebrain. [1] Most neurons of the nucleus basalis are rich in the neurotransmitter acetylcholine, and they have widespread projections to the ...

  8. Cell theory - Wikipedia

    en.wikipedia.org/wiki/Cell_theory

    The cell is the fundamental unit of structure and function in all living organisms. [14] The activity of an organism depends on the total activity of independent cells. [15] Energy flow (metabolism and biochemistry) occurs within cells. Cells contain DNA which is found specifically in the chromosome and RNA found in the cell nucleus and ...

  9. Nuclear pore - Wikipedia

    en.wikipedia.org/wiki/Nuclear_pore

    A nuclear pore is a channel as part of the nuclear pore complex (NPC), a large protein complex found in the nuclear envelope of eukaryotic cells. The nuclear envelope (NE) surrounds the cell nucleus containing DNA and facilitates the selective membrane transport of various molecules. The nuclear pore complex predominantly consists of proteins ...