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The Human Cell 101 - Simple to understand

The Human Cell 101

Cell Parts


      Differing in size, shape, and function, the cell is the smallest functional unit of tissues and organs - Each cell is somewhat self-contained and self-maintaining:


-       It can take in nutrients, convert these nutrients into energy, carry out specialized functions, and reproduce


-       Human cells have a surrounding protective membrane - enclosing a salty, watery cytoplasm in which is floating a set of membrane-bound organelles ("little organs"), which perform a number of vital functions for the cell.


For example:


         The cell nucleus houses DNA - the cell’s genetic blueprint containing the building instructions for various protein molecules, such as enzymes;


         The mitochondrion - is the cell’s “Power Plant”;


         The endoplasmic reticulum - is the transport network for active molecules;


         Ribosome – primary site of protein synthesis


         The Golgi complex  /apparatus  - is the cell’s central delivery system and a site for protein processing, packaging, and transport.


         Lysosome - contain enzymes that break down waste materials and cellular debris


         Centriole – two per cell;  help with mitosis and meisosis when cell divides.




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