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Related to Cell organelle: mitochondria, endoplasmic reticulum


(cell and molecular biology)
A specialized subcellular structure, such as a mitochondrion, having a special function; a condensed system showing a high degree of internal order and definite limits of size and shape.



a part of the body of a unicellular organism, or protozoan, that performs any one of various functions. Organelles are especially diverse and complex in Infusoria and Flagellata. There are several types of organelles. Skeletal and support organelles protect the organism from mechanical, chemical, and other harmful effects (for example, the shells of Sarcodina and Infusoria). There also are locomotor and contractile organelles (for example, flagella, cilia, and myonemes); sensory, or receptor, organelles (for example, photosensitive ocelli); and attack and defense organelles (for example, in Infusoria, the rod-shaped formations known as trichocysts, which are discharged from the body). Digestive organelles capture, conduct, and digest the food (for example, the digestive vacuoles of Infusoria). There are also excretory and secretory organelles (for example, the pulsating vacuoles of Infusoria). The term “organelle” is often used as a synonym for “organoid.”

References in periodicals archive ?
Also our previous study showed that apoptosis caused by I/R injury may be due to action endonuclease or by acting on cell organelles, alternating signal transduction pathways or affecting the intracellular enzymes responsible for proper functioning and survival of the cell [11, 12].
Three-dimensional imagery is expected to lead to a fundamental revision of scientific insight into the architecture and functioning of living cells, cell organelles, and their constituting supramolecular complexes, according to the FEI developers.
While many papers focus on the age-dependent changes in DNA, protein, membranes, and cell organelles, the ageing of connective tissue is also discussed, with attention being particularly paid to atherosclerotic degeneration.
The Titan Krios is ideal for advanced, high-resolution, dual-axis cryo electron tomography of frozen hydrated cells and cell organelles, single particle analysis and 2D electron crystallography.
Previous studies have linked telomeres to the function of mitochondria (essential cell organelles that act as cellular power plants) and vice versa.
To prevent them from multiplying, special cell organelles called autophagosomes are activated.
It can be used to separate a wide range of charged molecules and particles, including cells, cell organelles, cellular fragments and complex protein mixtures.
They've also found specific phosphorylation sites of cell proteins, identified immunolabeled antigens within cells, and determined the water content of cell organelles -- all useful facts for deciphering basic cell mechanisms.