CLASS IX NCERT SCIENCE Chapter 5 Fundamental Unit of Life : Cell
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Golgi Apparatus First described by Camillo Golgi. consists of a system of membrane-bound vesicles approximately parallel to each other in stacks. These stacks are called cisterns. These membranes often have connections with the membranes of ER.
Golgi apparatus incoming transport vesicle cis face cisternae lumen trans face newly forming vesicle secretory vesicle
s face and Trans face The plant cells contain many freely distributed subunits of Golgi Apparatus called Dictyosomes. cisternae are formed at one end of the stack, called Cis face of Golgi They are budded off as vesicles at the other face of Golgi Apparatus, called trans face of Golgi. Golgi Apparatus is absent in bacteria, blue-green algae, mature sperms and red blood cells of mammals and other animals.
Formation The Golgi apparatus arises from the membrane of the smooth endoplasmic reticulum which in turn originates from the rough endoplasmic reticulum Golgi saccules are constantly and rapidly renewed.
Functions The main function of the Golgi apparatus is secretory. The storage, modification and packaging the products in vesicles. Complex sugars may be made from simple sugar in Golgi Apparatus. The Golgi Apparatus is also involved in the formation of lysosomes.
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