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What is a cell

                      CELL

 INTRODUCTION : A cell is a basic , living structure and function unit of body enclosed by a membrane. there are about 200 different types of cells in our body.       

PARTS OF A CELLS.   

01.Plasma membrane. If forms outer flexible surface of the cells that separates its internal environment from the external environment. 

02. Cytoplasm: It consists of all cellular contents between the plasma membrane and  the nucleus.     

(a) Cytosol: It is the fluid portion of cytoplasm, contains wate, dissolved solutes and suspended particle.

 (b) Organelles: They are surrounded by cytosol. Each types of organelles has a characteristic shape and specific functions. 

03. Nucleus: The. Largest organelle contains most of cellular DNA. A single molecules of DNA is associated with several proteins to form chromosome which contains thousands of hereditary units called genes. 

 

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