A granule is a small grain. In describing cells, a granule may be any structure barely visible by light microscopy, but most often a secretoryvesicle. The word grain has several meanings, most being descriptive of a small piece or particle. ... Cells in culture, stained for keratin (red) and DNA (green). ... A secretory pathway is a term used to describe different methods that cells use to transport material to the outside, usually from the endoplasmic reticulum via the Golgi apparatus. ... In cell biology, a vesicle is a relatively small and enclosed compartment, separated from the cytosol by at least one lipid bilayer. ...
A group of leukocytes called granulocytes contain granules and play an important role in the immune system. The granules of certain cells, such as Natural Killer Cells, contain components which can lead to the lysis of neighboring cells. White Blood Cells is also the name of a White Stripes album. ... Granulocytes are a category of white blood cells, characterised by the fact that all types have differently staining granules in their cytoplasm on light microscopy. ... Natural killer cells (also known as NK cells, K cells, and killer cells) are a type of lymphocyte (a white blood cell) and a component of innate immune defense. ...
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