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In cell biology, the centrosome (Latin centrum 'center' + Greek sōma 'body') (archaically cytocentre [1]) is an organelle that serves as the main microtubule organizing center (MTOC) of the animal cell, as well as a regulator of cell-cycle progression. The centrosome provides structure for the cell.
Cyligramma limacina, an illustration from Félix Édouard Guérin-Méneville's Iconographie du Règne Animal de G. Cuvier 1829–1844. Le Règne Animal distribué d'après son organisation, pour servir de base à l'histoire naturelle des animaux et d'introduction à l'anatomie comparée (1st edition, 4 volumes, 1816) [a] (Volumes I, II and IV by Cuvier; Volume III by Pierre André Latreille)
The process is divided into three steps: protrusion of the leading edge of the cell, adhesion of the leading edge and de-adhesion at the cell body and rear, and cytoskeletal contraction to pull the cell forward. Each step is driven by physical forces generated by unique segments of the cytoskeleton. [17] [16]
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.
Nuclear DNA and mitochondrial DNA differ in many ways, starting with location and structure. Nuclear DNA is located within the nucleus of eukaryote cells and usually has two copies per cell while mitochondrial DNA is located in the mitochondria and contains 100–1,000 copies per cell.
A lupus erythematosus cell (LE cell), also known as Hargraves cell, is a neutrophil or macrophage that has phagocytized (engulfed) the denatured nuclear material of another cell. [1] The denatured material is an absorbed hematoxylin body (also called an LE body).
Perlia's nucleus, also known as nucleus of Perlia and abbreviated as NP, is a spindle-shaped nucleus located in the mesencephalon, a subdivision of the Edinger-Westphal nucleus [1] [2] situated between the right and left oculomotor nuclei.
Eukaryota Temporal range: Statherian – Present 1650–0 Ma Pha. Proterozoic Archean Had. Cryptista Viridiplantae Discoba Amoebozoa Rhizaria Alveolata Animalia Fungi Scientific classification Domain: Eukaryota (Chatton, 1925) Whittaker & Margulis, 1978 Subgroups Diaphoretickes TSAR Haptista CAM clade (including plants) Provora Hemimastigophora Jakobea Tsukubea Discicristata Euglenozoa ...