Golgi Body : Structure and Functions
Golgi body is a flattened, membrane-bounded, parallely arranged sacs and other vesicles usually located near the nucleus in the cytoplasmic matrix of almost all eukaryotic cells. It is also known as Golgy complex, Golgi apparatus, Golgiosome, Lipochondria and in the plant cell, it is also called Dictyosome. Camillo Golgi first observed it in the nerve cell of barn owl in 1898.
Occurrence: They are generally present in the cytoplasm near the nucleus but in the glandular cells, they are located between the nucleus and apex of the cell.
Structure of the Golgi body: Its shape varies from cell to cell. It is large in nerve cell and small in muscle cells. The nerve cell, liver cell and most of the plant cells contain multiple Golgi bodies. The Golgi body forms from plasma membrane, nuclear envelop and endoplasmic reticulum. Generally, Golgi body consists of three membranous components such as:
Cisternae: They are parallely arranged sacs like structure which are covered by smoothed-surfaced single membrane and piled one upon the other to form stacks. The number of sacs in the stack ranges from 3-20 in number which depends on the cell type. They are usually equally spaced in the stack.
Small vesicles: The vesicles are small droplet-like sacs and originate from the cisternae by building or “pinching off” process.
Large vacuoles: They are clear and large sac-like structures. They contain electron-dense materials.
Functions of Golgi body
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