Subcellular structure in eukaryotic cells (e g plants and animals) providing specialized function within cells Organelles are separated from each other and the cytoplasm of the cell by membranes
An organelle is any part of a cell that has a unique structural, functional or anatomical role On a smaller scale, organelles are similar to the organs in your body - they are, in effect, the organs of a cell
an intracellular ("within" the cell) structure (cell "organ") that has a specific function and structure E g nucleus, mitochondria, chloroplast A cell has many organelles, each performing a specific function for the whole cell, and without which the cell could not fully function
(1920): a specialized cellular part (as a mitochondrion, lysosome, or ribosome) that is analogous to an organ This is where the conversion within the cell of nutrients (such as sugar molecules) into chemical energy in the form of ATP, by reacting the food with oxygen (O2) until the food has completely been degraded into carbon dioxide and H2O
Membrane-bound structure in a eukaryotic cell Organelles partition the cell into regions which carry out different cellular functions Mitochondria, the ER, and lysosomes are examples of organelles